This is a mini project on a Text Editor which is made through Java Swing and AWT. Java Swing is used to create Window based Application and built on top of Abstract Windowing Toolkit (AWT) API entirely written in java. Java Swing provide totally platform independent and lightweight componenets to build any application.
FindDialogue.java
//package p1;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
/******************************************************/
class FindReplaceDemo extends JFrame
{
FindDialog dialog=null;
JTextArea ta;
JButton findButton,replaceButton;
FindReplaceDemo()
{
super("Find Demo");
ta=new JTextArea(7,20);
findButton=new JButton("Find text");
ActionListener ac1=new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
if(dialog==null)
dialog=new FindDialog(FindReplaceDemo.this.ta);
dialog.showDialog(FindReplaceDemo.this,true);//find
}
};
findButton.addActionListener(ac1);
replaceButton=new JButton("Replace text");
ActionListener ac2=new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
if(dialog==null)
dialog=new FindDialog(FindReplaceDemo.this.ta);
dialog.showDialog(FindReplaceDemo.this,false);//find
}
};
replaceButton.addActionListener(ac2);
add(ta,BorderLayout.CENTER);
add(replaceButton,BorderLayout.NORTH);
add(findButton,BorderLayout.SOUTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(50,50,400,400);
ta.append("Hello dear. how r u?");
ta.append("\nhey i said Hello and not hello or Hel or hello.");
ta.append("\nWell do u know what is the meaning of Hello");
ta.append("\n Hello is no hello but it is Hello");
ta.setCaretPosition(0);
setVisible(true);
}
////////////////////////////////
public static void main(String[] args)
{
new FindReplaceDemo();
}
}
/******************************************************/
public class FindDialog extends JPanel implements ActionListener
{
JTextArea jta;
public int lastIndex;
JLabel replaceLabel;
private TextField findWhat;
private JTextField replaceWith;
private JCheckBox matchCase;
JRadioButton up, down;
JButton findNextButton, replaceButton, replaceAllButton, cancelButton;
JPanel direction,buttonPanel, findButtonPanel, replaceButtonPanel;
CardLayout card;
private boolean ok;
private JDialog dialog;
///////////////////////
public FindDialog(JTextArea jta)
{
this.jta=jta;
findWhat=new TextField(20);
replaceWith=new JTextField(20);
matchCase=new JCheckBox("Match case");
up=new JRadioButton("Up");
down=new JRadioButton("Down");
down.setSelected(true);
ButtonGroup bg=new ButtonGroup();
bg.add(up);
bg.add(down);
direction=new JPanel();
Border etched=BorderFactory.createEtchedBorder();
Border titled=BorderFactory.createTitledBorder(etched,"Direction");
direction.setBorder(titled);
direction.setLayout(new GridLayout(1,2));
direction.add(up);
direction.add(down);
JPanel southPanel=new JPanel();
southPanel.setLayout(new GridLayout(1,2));
southPanel.add(matchCase);
southPanel.add(direction);
findNextButton=new JButton("Find Next");
replaceButton=new JButton("Replace");
replaceAllButton=new JButton("Replace All");
cancelButton=new JButton("Cancel");
/*
findButtonPanel=new JPanel();
findButtonPanel.setLayout(new GridLayout(2,1));
findButtonPanel.add(findNextButton);
findButtonPanel.add(cancelButton);
*/
replaceButtonPanel=new JPanel();
replaceButtonPanel.setLayout(new GridLayout(4,1));
replaceButtonPanel.add(findNextButton);
replaceButtonPanel.add(replaceButton);
replaceButtonPanel.add(replaceAllButton);
replaceButtonPanel.add(cancelButton);
/*
card=new CardLayout();
buttonPanel=new JPanel();
buttonPanel.setLayout(card);
buttonPanel.add(replaceButtonPanel,"replace");
buttonPanel.add(findButtonPanel,"find");
card.first(buttonPanel);
*/
JPanel textPanel=new JPanel();
textPanel.setLayout(new GridLayout(3,2));
textPanel.add(new JLabel("Find what "));
textPanel.add(findWhat);
textPanel.add(replaceLabel=new JLabel("Replace With "));
textPanel.add(replaceWith);
textPanel.add(new JLabel(" "));//dummy Lable
textPanel.add(new JLabel(" "));//dummy Lable
setLayout(new BorderLayout());
add(new JLabel(" "),BorderLayout.NORTH);//dummy label
add(textPanel,BorderLayout.CENTER);
add(replaceButtonPanel,BorderLayout.EAST);
add(southPanel,BorderLayout.SOUTH);
setSize(200,200);
findNextButton.addActionListener(this);
replaceButton.addActionListener(this);
replaceAllButton.addActionListener(this);
cancelButton.addActionListener(new ActionListener()
{public void actionPerformed(ActionEvent ev){dialog.setVisible(false);}});
findWhat.addFocusListener(
new FocusAdapter(){public void focusLost(FocusEvent te){enableDisableButtons();}});
findWhat.addTextListener(
new TextListener(){public void textValueChanged(TextEvent te){enableDisableButtons();}});
}
//////////////////////////
void enableDisableButtons()
{
if(findWhat.getText().length()==0)
{
findNextButton.setEnabled(false);
replaceButton.setEnabled(false);
replaceAllButton.setEnabled(false);
}
else
{
findNextButton.setEnabled(true);
replaceButton.setEnabled(true);
replaceAllButton.setEnabled(true);
}
}
///////////////////////////////////
public void actionPerformed(ActionEvent ev)
{
if(ev.getSource()==findNextButton)
findNextWithSelection();
else if(ev.getSource()==replaceButton)
replaceNext();
else if(ev.getSource()==replaceAllButton)
JOptionPane.showMessageDialog(null,"Total replacements made= "+replaceAllNext());
}
/////////////////////////
int findNext()
{
String s1=jta.getText();
String s2=findWhat.getText();
lastIndex=jta.getCaretPosition();
int selStart=jta.getSelectionStart();
int selEnd=jta.getSelectionEnd();
if(up.isSelected())
{
if(selStart!=selEnd)
lastIndex=selEnd-s2.length()-1;
/*****Notepad doesnt use the else part, but it should be, instead of using caretPosition.***
else
lastIndex=lastIndex-s2.length();
******/
if(!matchCase.isSelected())
lastIndex=s1.toUpperCase().lastIndexOf(s2.toUpperCase(),lastIndex);
else
lastIndex=s1.lastIndexOf(s2,lastIndex);
}
else
{
if(selStart!=selEnd)
lastIndex=selStart+1;
if(!matchCase.isSelected())
lastIndex=s1.toUpperCase().indexOf(s2.toUpperCase(),lastIndex);
else
lastIndex=s1.indexOf(s2,lastIndex);
}
return lastIndex;
}
///////////////////////////////////////////////
public void findNextWithSelection()
{
int idx=findNext();
if(idx!=-1)
{
jta.setSelectionStart(idx);
jta.setSelectionEnd(idx+findWhat.getText().length());
}
else
JOptionPane.showMessageDialog(this,
"Cannot find"+" \""+findWhat.getText()+"\"",
"Find",JOptionPane.INFORMATION_MESSAGE);
}
//////////////////////////////////////////////
void replaceNext()
{
// if nothing is selectd
if(jta.getSelectionStart()==jta.getSelectionEnd())
{findNextWithSelection();return;}
String searchText=findWhat.getText();
String temp=jta.getSelectedText(); //get selected text
//check if the selected text matches the search text then do replacement
if(
(matchCase.isSelected() && temp.equals(searchText))
||
(!matchCase.isSelected() && temp.equalsIgnoreCase(searchText))
)
jta.replaceSelection(replaceWith.getText());
findNextWithSelection();
}
//////////////////////////////////////////////
int replaceAllNext()
{
if(up.isSelected())
jta.setCaretPosition(jta.getText().length()-1);
else
jta.setCaretPosition(0);
int idx=0;
int counter=0;
do
{
idx=findNext();
if(idx==-1) break;
counter++;
jta.replaceRange(replaceWith.getText(),idx,idx+findWhat.getText().length());
}while(idx!=-1);
return counter;
}
//////////////////////////////////////////////
public boolean showDialog(Component parent, boolean isFind )
{
Frame owner=null;
if(parent instanceof Frame)
owner=(Frame)parent;
else
owner=(Frame)SwingUtilities.getAncestorOfClass(Frame.class,parent);
if(dialog==null || dialog.getOwner()!=owner)
{
dialog=new JDialog(owner,false);
dialog.add(this);
dialog.getRootPane().setDefaultButton(findNextButton);
}
if(findWhat.getText().length()==0)
findNextButton.setEnabled(false);
else
findNextButton.setEnabled(true);
replaceButton.setVisible(false);
replaceAllButton.setVisible(false);
replaceWith.setVisible(false);
replaceLabel.setVisible(false);
if(isFind)
{
//card.show(buttonPanel,"find");
dialog.setSize(460,180);
dialog.setTitle("Find");
}
else
{
replaceButton.setVisible(true);
replaceAllButton.setVisible(true);
replaceWith.setVisible(true);
replaceLabel.setVisible(true);
//card.show(buttonPanel,"replace");
dialog.setSize(450,200);
dialog.setTitle("Replace");
}
dialog.setVisible(true);
//System.out.println(dialog.getWidth()+" "+dialog.getHeight());
return ok;
}
//////////////////////////////
}
FontChooser.java
//package p1;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
/******************************************************/
class FontDemo extends JFrame
{
FontChooser dialog=null;
JTextArea ta;
JButton fontButton;
FontDemo()
{
super("Font");
ta=new JTextArea(7,20);
fontButton=new JButton("Set Font");
ActionListener ac=new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
if(dialog==null)
dialog=new FontChooser(ta.getFont());
if(dialog.showDialog(FontDemo.this,"Choose a font"))
{
FontDemo.this.ta.setFont(dialog.createFont());
}
}
};
fontButton.addActionListener(ac);
add(ta,BorderLayout.CENTER);
add(fontButton,BorderLayout.SOUTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(50,50,400,400);
ta.append("Hello dear. how r u?");
ta.append("\n\n A quick brown fox jumps over the lazy dog.");
ta.append("\n\n0123456789");
ta.append("\n~!@#$%^&*()_+|?><");
setVisible(true);
}
////////////////////////////////
public static void main(String[] args)
{
new FontDemo();
}
}
/******************************************************/
public class FontChooser extends JPanel //implements ActionListener
{
private Font thisFont;
private JList jFace, jStyle, jSize;
private JDialog dialog;
private JButton okButton;
JTextArea tf;
private boolean ok;
public FontChooser(Font withFont)
{
thisFont=withFont;
////////////////////
String[] fontNames=
GraphicsEnvironment
.getLocalGraphicsEnvironment()
.getAvailableFontFamilyNames();
jFace=new JList(fontNames); jFace.setSelectedIndex(0);
jFace.addListSelectionListener(new ListSelectionListener()
{public void valueChanged(ListSelectionEvent ev){tf.setFont(createFont());}});
String[] fontStyles={"Regular","Italic","Bold","Bold Italic"};
jStyle=new JList(fontStyles);jStyle.setSelectedIndex(0);
jStyle.addListSelectionListener(new ListSelectionListener()
{public void valueChanged(ListSelectionEvent ev){tf.setFont(createFont());}});
String[] fontSizes=new String[30];
for(int j=0; j<30; j++)
fontSizes[j]=new String(10+j*2+"");
jSize=new JList(fontSizes); jSize.setSelectedIndex(0);
jSize.addListSelectionListener(new ListSelectionListener()
{public void valueChanged(ListSelectionEvent ev){tf.setFont(createFont());}});
JPanel jpLabel=new JPanel();
jpLabel.setLayout(new GridLayout(1,3));
jpLabel.add(new JLabel("Font",JLabel.CENTER));
jpLabel.add(new JLabel("Font Style",JLabel.CENTER));
jpLabel.add(new JLabel("Size",JLabel.CENTER));
JPanel jpList=new JPanel();
jpList.setLayout(new GridLayout(1,3));
jpList.add(new JScrollPane(jFace));
jpList.add(new JScrollPane(jStyle));
jpList.add(new JScrollPane(jSize));
okButton=new JButton("OK");
JButton cancelButton=new JButton("Cancel");
okButton.addActionListener(
new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
ok=true;
FontChooser.this.thisFont=FontChooser.this.createFont();
dialog.setVisible(false);
}
});
cancelButton.addActionListener(
new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
dialog.setVisible(false);
}
});
JPanel jpButton=new JPanel();
jpButton.setLayout(new FlowLayout());
jpButton.add(okButton);
jpButton.add(new JLabel(" "));//dummy Label
jpButton.add(cancelButton);
tf=new JTextArea(5,30);
JPanel jpTextField=new JPanel();
jpTextField.add(new JScrollPane(tf));
JPanel centerPanel=new JPanel();
centerPanel.setLayout(new GridLayout(2,1));
centerPanel.add(jpList);
centerPanel.add(jpTextField);
setLayout(new BorderLayout());
add(jpLabel,BorderLayout.NORTH);
add(centerPanel,BorderLayout.CENTER);
add(jpButton,BorderLayout.SOUTH);
add(new JLabel(" "),BorderLayout.EAST);//dummy label
add(new JLabel(" "),BorderLayout.WEST);//dummy label
tf.setFont(thisFont);
tf.append("\nA quick brown fox jumps over the lazy dog.");
tf.append("\n0123456789");
tf.append("\n~!@#$%^&*()_+|?><\n");
}
//////////////////////////
public Font createFont()
{
Font fnt=thisFont;
int fontstyle=Font.PLAIN;
int x=jStyle.getSelectedIndex();
switch(x)
{
case 0:
fontstyle=Font.PLAIN; break;
case 1:
fontstyle=Font.ITALIC; break;
case 2:
fontstyle=Font.BOLD; break;
case 3:
fontstyle=Font.BOLD+Font.ITALIC; break;
}
int fontsize=Integer.parseInt((String)jSize.getSelectedValue());
String fontname=(String)jFace.getSelectedValue();
fnt=new Font(fontname,fontstyle,fontsize);
return fnt;
}
//////////////////////////////////
public boolean showDialog(Component parent, String title)
{
ok=false;
Frame owner=null;
if(parent instanceof Frame)
owner=(Frame)parent;
else
owner=(Frame)SwingUtilities.getAncestorOfClass(Frame.class,parent);
if(dialog==null || dialog.getOwner()!=owner)
{
dialog=new JDialog(owner,true);
dialog.add(this);
dialog.getRootPane().setDefaultButton(okButton);
dialog.setSize(400,325);
}
dialog.setTitle(title);
dialog.setVisible(true);
//System.out.println(dialog.getWidth()+" "+dialog.getHeight());
return ok;
}
//////////////////////////////
}
LookAndFeelMenu.java
//package p1;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/***************************************************/
class LookAndFeelDemo extends JFrame
{
JLabel myLabel;
JMenuBar jmb;
JMenu fileMenu;
LookAndFeelDemo()
{
super("Look and Feel Demo");
add(myLabel=new JLabel("This is a Label"));
add(new JButton("Button"));
add(new JCheckBox("CheckBox"));
add(new JRadioButton("RadioButton"));
setLayout(new FlowLayout());
setSize(350,350);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
jmb=new JMenuBar();
setJMenuBar(jmb);
fileMenu=new JMenu("Look and Feel");
jmb.add(fileMenu);
LookAndFeelMenu.createLookAndFeelMenuItem(fileMenu,this);
setVisible(true);
}
////////////////////////
///////////////////////
public static void main(String[] args)
{
new LookAndFeelDemo();
}
////////////////////////
}
/************************/
public class LookAndFeelMenu
{
public static void createLookAndFeelMenuItem(JMenu jmenu,Component cmp)
{
final UIManager.LookAndFeelInfo[] infos=UIManager.getInstalledLookAndFeels();
JRadioButtonMenuItem rbm[]=new JRadioButtonMenuItem[infos.length];
ButtonGroup bg=new ButtonGroup();
JMenu tmp=new JMenu("Change Look and Feel");
tmp.setMnemonic('C');
for(int i=0; i<infos.length; i++)
{
rbm[i]=new JRadioButtonMenuItem(infos[i].getName());
rbm[i].setMnemonic(infos[i].getName().charAt(0));
tmp.add(rbm[i]);
bg.add(rbm[i]);
rbm[i].addActionListener(new LookAndFeelMenuListener(infos[i].getClassName(),cmp));
}
rbm[0].setSelected(true);
jmenu.add(tmp);
}
}
/**************************/
class LookAndFeelMenuListener implements ActionListener
{
String classname;
Component jf;
/////////////////////
LookAndFeelMenuListener(String cln,Component jf)
{
this.jf=jf;
classname=new String(cln);
}
/////////////////////
public void actionPerformed(ActionEvent ev)
{
try
{
UIManager.setLookAndFeel(classname);
SwingUtilities.updateComponentTreeUI(jf);
}
catch(Exception e){System.out.println(e);}
}
///////////////////////////////
}
/*************************/
MyFileFilter.java
//package p1;
import java.io.File;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.FileFilter;
/***************************************************/
class FileFilterDemo extends JFrame
{
JLabel myLabel;
JButton myButton;
JFileChooser chooser;
FileFilterDemo()
{
super("File Filter Demo");
myLabel=new JLabel("No file is choosed yet");
myButton=new JButton("Choose file");
ActionListener listener=
new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
if (FileFilterDemo.this.chooser==null)
chooser=new JFileChooser();
chooser.addChoosableFileFilter(new MyFileFilter(".java","Java Source Files(*.java)"));
chooser.addChoosableFileFilter(new MyFileFilter(".txt","Text Files(*.txt)"));
//filter=new MyFilter(); then filter is equivalent to select all files
if(chooser.showDialog(FileFilterDemo.this,"Select this")==JFileChooser.APPROVE_OPTION)
FileFilterDemo.this.myLabel.setText(chooser.getSelectedFile().getPath());
}
};
myButton.addActionListener(listener);
add(myLabel,"Center");
add(myButton,"South");
setSize(300,300);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args)
{
FileFilterDemo ffd=new FileFilterDemo();
ffd.setVisible(true);
}
}
/***************************************************/
public class MyFileFilter extends FileFilter
{
private String extension;
private String description;
////////////////
public MyFileFilter()
{
setExtension(null);
setDescription(null);
}
////////////////
public MyFileFilter(final String ext, final String desc)
{
setExtension(ext);
setDescription(desc);
}
////////////////
public boolean accept(File f)
{
final String filename=f.getName();
if( f.isDirectory() ||
extension==null ||
filename.toUpperCase()
.endsWith(extension.toUpperCase()))
return true;
return false;
}
////////////////
public String getDescription()
{
return description;
}
////////////////
public void setDescription(String desc)
{
if(desc==null)
description=new String("All Files(*.*)");
else
description=new String(desc);
}
////////////////
public void setExtension(String ext)
{
if(ext==null)
{extension=null; return;}
extension=new String(ext).toLowerCase();
if(!ext.startsWith("."))
extension="."+extension;
}
////////////////
}
/***************************************************/
Notepad.java
//package p1;
import java.io.*;
import java.util.Date;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
//import p1.FontChooser;
//import p1.FontDialog;
//import p1.FindDialog;
//import p1.LookAndFeelMenu;
//import p1.MyFileFilter;
/************************************/
class FileOperation
{
Notepad npd;
boolean saved;
boolean newFileFlag;
String fileName;
String applicationTitle="Notepad";
File fileRef;
JFileChooser chooser;
/////////////////////////////
boolean isSave(){return saved;}
void setSave(boolean saved){this.saved=saved;}
String getFileName(){return new String(fileName);}
void setFileName(String fileName){this.fileName=new String(fileName);}
/////////////////////////
FileOperation(Notepad npd)
{
this.npd=npd;
saved=true;
newFileFlag=true;
fileName=new String("New File");
fileRef=new File(fileName);
this.npd.f.setTitle(fileName+" - "+applicationTitle);
chooser=new JFileChooser();
chooser.addChoosableFileFilter(new MyFileFilter(".java","Java Source Files(*.java)"));
chooser.addChoosableFileFilter(new MyFileFilter(".txt","Text Files(*.txt)"));
chooser.setCurrentDirectory(new File("."));
}
//////////////////////////////////////
boolean saveFile(File temp)
{
FileWriter fout=null;
try
{
fout=new FileWriter(temp);
fout.write(npd.ta.getText());
}
catch(IOException ioe){updateStatus(temp,false);return false;}
finally
{try{fout.close();}catch(IOException excp){}}
updateStatus(temp,true);
return true;
}
////////////////////////
boolean saveThisFile()
{
if(!newFileFlag)
{return saveFile(fileRef);}
return saveAsFile();
}
////////////////////////////////////
boolean saveAsFile()
{
File temp=null;
chooser.setDialogTitle("Save As...");
chooser.setApproveButtonText("Save Now");
chooser.setApproveButtonMnemonic(KeyEvent.VK_S);
chooser.setApproveButtonToolTipText("Click me to save!");
do
{
if(chooser.showSaveDialog(this.npd.f)!=JFileChooser.APPROVE_OPTION)
return false;
temp=chooser.getSelectedFile();
if(!temp.exists()) break;
if( JOptionPane.showConfirmDialog(
this.npd.f,"<html>"+temp.getPath()+" already exists.<br>Do you want to replace it?<html>",
"Save As",JOptionPane.YES_NO_OPTION
)==JOptionPane.YES_OPTION)
break;
}while(true);
return saveFile(temp);
}
////////////////////////
boolean openFile(File temp)
{
FileInputStream fin=null;
BufferedReader din=null;
try
{
fin=new FileInputStream(temp);
din=new BufferedReader(new InputStreamReader(fin));
String str=" ";
while(str!=null)
{
str=din.readLine();
if(str==null)
break;
this.npd.ta.append(str+"\n");
}
}
catch(IOException ioe){updateStatus(temp,false);return false;}
finally
{try{din.close();fin.close();}catch(IOException excp){}}
updateStatus(temp,true);
this.npd.ta.setCaretPosition(0);
return true;
}
///////////////////////
void openFile()
{
if(!confirmSave()) return;
chooser.setDialogTitle("Open File...");
chooser.setApproveButtonText("Open this");
chooser.setApproveButtonMnemonic(KeyEvent.VK_O);
chooser.setApproveButtonToolTipText("Click me to open the selected file.!");
File temp=null;
do
{
if(chooser.showOpenDialog(this.npd.f)!=JFileChooser.APPROVE_OPTION)
return;
temp=chooser.getSelectedFile();
if(temp.exists()) break;
JOptionPane.showMessageDialog(this.npd.f,
"<html>"+temp.getName()+"<br>file not found.<br>"+
"Please verify the correct file name was given.<html>",
"Open", JOptionPane.INFORMATION_MESSAGE);
} while(true);
this.npd.ta.setText("");
if(!openFile(temp))
{
fileName="New File"; saved=true;
this.npd.f.setTitle(fileName+" - "+applicationTitle);
}
if(!temp.canWrite())
newFileFlag=true;
}
////////////////////////
void updateStatus(File temp,boolean saved)
{
if(saved)
{
this.saved=true;
fileName=new String(temp.getName());
if(!temp.canWrite())
{fileName+="(Read only)"; newFileFlag=true;}
fileRef=temp;
npd.f.setTitle(fileName + " - "+applicationTitle);
npd.statusBar.setText("File : "+temp.getPath()+" saved/opened successfully.");
newFileFlag=false;
}
else
{
npd.statusBar.setText("Failed to save/open : "+temp.getPath());
}
}
///////////////////////
boolean confirmSave()
{
String strMsg="<html>The text in the "+fileName+" file has been changed.<br>"+
"Do you want to save the changes?<html>";
if(!saved)
{
int x=JOptionPane.showConfirmDialog(this.npd.f,strMsg,applicationTitle,JOptionPane.YES_NO_CANCEL_OPTION);
if(x==JOptionPane.CANCEL_OPTION) return false;
if(x==JOptionPane.YES_OPTION && !saveAsFile()) return false;
}
return true;
}
///////////////////////////////////////
void newFile()
{
if(!confirmSave()) return;
this.npd.ta.setText("");
fileName=new String("Untitled");
fileRef=new File(fileName);
saved=true;
newFileFlag=true;
this.npd.f.setTitle(fileName+" - "+applicationTitle);
}
//////////////////////////////////////
}// end defination of class FileOperation
/************************************/
public class Notepad implements ActionListener, MenuConstants
{
JFrame f;
JTextArea ta;
JLabel statusBar;
private String fileName="New File";
private boolean saved=true;
String applicationName="Notepad";
String searchString, replaceString;
int lastSearchIndex;
FileOperation fileHandler;
FontChooser fontDialog=null;
FindDialog findReplaceDialog=null;
JColorChooser bcolorChooser=null;
JColorChooser fcolorChooser=null;
JDialog backgroundDialog=null;
JDialog foregroundDialog=null;
JMenuItem cutItem,copyItem, deleteItem, findItem, findNextItem, replaceItem, gotoItem, selectAllItem;
/****************************/
Notepad()
{
f=new JFrame(fileName+" - "+applicationName);
ta=new JTextArea(30,60);
statusBar=new JLabel("|| Ln 1, Col 1 ",JLabel.RIGHT);
f.add(new JScrollPane(ta),BorderLayout.CENTER);
f.add(statusBar,BorderLayout.SOUTH);
f.add(new JLabel(" "),BorderLayout.EAST);
f.add(new JLabel(" "),BorderLayout.WEST);
createMenuBar(f);
//f.setSize(350,350);
f.pack();
f.setLocation(100,50);
f.setVisible(true);
f.setLocation(150,50);
f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
fileHandler=new FileOperation(this);
/////////////////////
ta.addCaretListener(
new CaretListener()
{
public void caretUpdate(CaretEvent e)
{
int lineNumber=0, column=0, pos=0;
try
{
pos=ta.getCaretPosition();
lineNumber=ta.getLineOfOffset(pos);
column=pos-ta.getLineStartOffset(lineNumber);
}catch(Exception excp){}
if(ta.getText().length()==0){lineNumber=0; column=0;}
statusBar.setText("|| Ln "+(lineNumber+1)+", Col "+(column+1));
}
});
//////////////////
DocumentListener myListener = new DocumentListener()
{
public void changedUpdate(DocumentEvent e){fileHandler.saved=false;}
public void removeUpdate(DocumentEvent e){fileHandler.saved=false;}
public void insertUpdate(DocumentEvent e){fileHandler.saved=false;}
};
ta.getDocument().addDocumentListener(myListener);
/////////
WindowListener frameClose=new WindowAdapter()
{
public void windowClosing(WindowEvent we)
{
if(fileHandler.confirmSave())System.exit(0);
}
};
f.addWindowListener(frameClose);
//////////////////
/*
ta.append("Hello dear hello hi");
ta.append("\nwho are u dear mister hello");
ta.append("\nhello bye hel");
ta.append("\nHello");
ta.append("\nMiss u mister hello hell");
fileHandler.saved=true;
*/
}
////////////////////////////////////
void goTo()
{
int lineNumber=0;
try
{
lineNumber=ta.getLineOfOffset(ta.getCaretPosition())+1;
String tempStr=JOptionPane.showInputDialog(f,"Enter Line Number:",""+lineNumber);
if(tempStr==null)
{return;}
lineNumber=Integer.parseInt(tempStr);
ta.setCaretPosition(ta.getLineStartOffset(lineNumber-1));
}catch(Exception e){}
}
///////////////////////////////////
public void actionPerformed(ActionEvent ev)
{
String cmdText=ev.getActionCommand();
////////////////////////////////////
if(cmdText.equals(fileNew))
fileHandler.newFile();
else if(cmdText.equals(fileOpen))
fileHandler.openFile();
////////////////////////////////////
else if(cmdText.equals(fileSave))
fileHandler.saveThisFile();
////////////////////////////////////
else if(cmdText.equals(fileSaveAs))
fileHandler.saveAsFile();
////////////////////////////////////
else if(cmdText.equals(fileExit))
{if(fileHandler.confirmSave())System.exit(0);}
////////////////////////////////////
else if(cmdText.equals(filePrint))
JOptionPane.showMessageDialog(
Notepad.this.f,
"Get ur printer repaired first! It seems u dont have one!",
"Bad Printer",
JOptionPane.INFORMATION_MESSAGE
);
////////////////////////////////////
else if(cmdText.equals(editCut))
ta.cut();
////////////////////////////////////
else if(cmdText.equals(editCopy))
ta.copy();
////////////////////////////////////
else if(cmdText.equals(editPaste))
ta.paste();
////////////////////////////////////
else if(cmdText.equals(editDelete))
ta.replaceSelection("");
////////////////////////////////////
else if(cmdText.equals(editFind))
{
if(Notepad.this.ta.getText().length()==0)
return; // text box have no text
if(findReplaceDialog==null)
findReplaceDialog=new FindDialog(Notepad.this.ta);
findReplaceDialog.showDialog(Notepad.this.f,true);//find
}
////////////////////////////////////
else if(cmdText.equals(editFindNext))
{
if(Notepad.this.ta.getText().length()==0)
return; // text box have no text
if(findReplaceDialog==null)
statusBar.setText("Nothing to search for, use Find option of Edit Menu first !!!!");
else
findReplaceDialog.findNextWithSelection();
}
////////////////////////////////////
else if(cmdText.equals(editReplace))
{
if(Notepad.this.ta.getText().length()==0)
return; // text box have no text
if(findReplaceDialog==null)
findReplaceDialog=new FindDialog(Notepad.this.ta);
findReplaceDialog.showDialog(Notepad.this.f,false);//replace
}
////////////////////////////////////
else if(cmdText.equals(editGoTo))
{
if(Notepad.this.ta.getText().length()==0)
return; // text box have no text
goTo();
}
////////////////////////////////////
else if(cmdText.equals(editSelectAll))
ta.selectAll();
////////////////////////////////////
else if(cmdText.equals(editTimeDate))
ta.insert(new Date().toString(),ta.getSelectionStart());
////////////////////////////////////
else if(cmdText.equals(formatWordWrap))
{
JCheckBoxMenuItem temp=(JCheckBoxMenuItem)ev.getSource();
ta.setLineWrap(temp.isSelected());
}
////////////////////////////////////
else if(cmdText.equals(formatFont))
{
if(fontDialog==null)
fontDialog=new FontChooser(ta.getFont());
if(fontDialog.showDialog(Notepad.this.f,"Choose a font"))
Notepad.this.ta.setFont(fontDialog.createFont());
}
////////////////////////////////////
else if(cmdText.equals(formatForeground))
showForegroundColorDialog();
////////////////////////////////////
else if(cmdText.equals(formatBackground))
showBackgroundColorDialog();
////////////////////////////////////
else if(cmdText.equals(viewStatusBar))
{
JCheckBoxMenuItem temp=(JCheckBoxMenuItem)ev.getSource();
statusBar.setVisible(temp.isSelected());
}
////////////////////////////////////
else if(cmdText.equals(helpAboutNotepad))
{
JOptionPane.showMessageDialog(Notepad.this.f,aboutText,"About",JOptionPane.INFORMATION_MESSAGE);
}
else
statusBar.setText("This "+cmdText+" command is yet to be implemented");
}//action Performed
////////////////////////////////////
void showBackgroundColorDialog()
{
if(bcolorChooser==null)
bcolorChooser=new JColorChooser();
if(backgroundDialog==null)
backgroundDialog=JColorChooser.createDialog
(Notepad.this.f,
formatBackground,
false,
bcolorChooser,
new ActionListener()
{public void actionPerformed(ActionEvent evvv){
Notepad.this.ta.setBackground(bcolorChooser.getColor());}},
null);
backgroundDialog.setVisible(true);
}
////////////////////////////////////
void showForegroundColorDialog()
{
if(fcolorChooser==null)
fcolorChooser=new JColorChooser();
if(foregroundDialog==null)
foregroundDialog=JColorChooser.createDialog
(Notepad.this.f,
formatForeground,
false,
fcolorChooser,
new ActionListener()
{public void actionPerformed(ActionEvent evvv){
Notepad.this.ta.setForeground(fcolorChooser.getColor());}},
null);
foregroundDialog.setVisible(true);
}
///////////////////////////////////
JMenuItem createMenuItem(String s, int key,JMenu toMenu,ActionListener al)
{
JMenuItem temp=new JMenuItem(s,key);
temp.addActionListener(al);
toMenu.add(temp);
return temp;
}
////////////////////////////////////
JMenuItem createMenuItem(String s, int key,JMenu toMenu,int aclKey,ActionListener al)
{
JMenuItem temp=new JMenuItem(s,key);
temp.addActionListener(al);
temp.setAccelerator(KeyStroke.getKeyStroke(aclKey,ActionEvent.CTRL_MASK));
toMenu.add(temp);
return temp;
}
////////////////////////////////////
JCheckBoxMenuItem createCheckBoxMenuItem(String s, int key,JMenu toMenu,ActionListener al)
{
JCheckBoxMenuItem temp=new JCheckBoxMenuItem(s);
temp.setMnemonic(key);
temp.addActionListener(al);
temp.setSelected(false);
toMenu.add(temp);
return temp;
}
////////////////////////////////////
JMenu createMenu(String s,int key,JMenuBar toMenuBar)
{
JMenu temp=new JMenu(s);
temp.setMnemonic(key);
toMenuBar.add(temp);
return temp;
}
/*********************************/
void createMenuBar(JFrame f)
{
JMenuBar mb=new JMenuBar();
JMenuItem temp;
JMenu fileMenu=createMenu(fileText,KeyEvent.VK_F,mb);
JMenu editMenu=createMenu(editText,KeyEvent.VK_E,mb);
JMenu formatMenu=createMenu(formatText,KeyEvent.VK_O,mb);
JMenu viewMenu=createMenu(viewText,KeyEvent.VK_V,mb);
JMenu helpMenu=createMenu(helpText,KeyEvent.VK_H,mb);
createMenuItem(fileNew,KeyEvent.VK_N,fileMenu,KeyEvent.VK_N,this);
createMenuItem(fileOpen,KeyEvent.VK_O,fileMenu,KeyEvent.VK_O,this);
createMenuItem(fileSave,KeyEvent.VK_S,fileMenu,KeyEvent.VK_S,this);
createMenuItem(fileSaveAs,KeyEvent.VK_A,fileMenu,this);
fileMenu.addSeparator();
temp=createMenuItem(filePageSetup,KeyEvent.VK_U,fileMenu,this);
temp.setEnabled(false);
createMenuItem(filePrint,KeyEvent.VK_P,fileMenu,KeyEvent.VK_P,this);
fileMenu.addSeparator();
createMenuItem(fileExit,KeyEvent.VK_X,fileMenu,this);
temp=createMenuItem(editUndo,KeyEvent.VK_U,editMenu,KeyEvent.VK_Z,this);
temp.setEnabled(false);
editMenu.addSeparator();
cutItem=createMenuItem(editCut,KeyEvent.VK_T,editMenu,KeyEvent.VK_X,this);
copyItem=createMenuItem(editCopy,KeyEvent.VK_C,editMenu,KeyEvent.VK_C,this);
createMenuItem(editPaste,KeyEvent.VK_P,editMenu,KeyEvent.VK_V,this);
deleteItem=createMenuItem(editDelete,KeyEvent.VK_L,editMenu,this);
deleteItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,0));
editMenu.addSeparator();
findItem=createMenuItem(editFind,KeyEvent.VK_F,editMenu,KeyEvent.VK_F,this);
findNextItem=createMenuItem(editFindNext,KeyEvent.VK_N,editMenu,this);
findNextItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0));
replaceItem=createMenuItem(editReplace,KeyEvent.VK_R,editMenu,KeyEvent.VK_H,this);
gotoItem=createMenuItem(editGoTo,KeyEvent.VK_G,editMenu,KeyEvent.VK_G,this);
editMenu.addSeparator();
selectAllItem=createMenuItem(editSelectAll,KeyEvent.VK_A,editMenu,KeyEvent.VK_A,this);
createMenuItem(editTimeDate,KeyEvent.VK_D,editMenu,this).setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,0));
createCheckBoxMenuItem(formatWordWrap,KeyEvent.VK_W,formatMenu,this);
createMenuItem(formatFont,KeyEvent.VK_F,formatMenu,this);
formatMenu.addSeparator();
createMenuItem(formatForeground,KeyEvent.VK_T,formatMenu,this);
createMenuItem(formatBackground,KeyEvent.VK_P,formatMenu,this);
createCheckBoxMenuItem(viewStatusBar,KeyEvent.VK_S,viewMenu,this).setSelected(true);
/************For Look and Feel, May not work properly on different operating environment***/
LookAndFeelMenu.createLookAndFeelMenuItem(viewMenu,this.f);
temp=createMenuItem(helpHelpTopic,KeyEvent.VK_H,helpMenu,this);
temp.setEnabled(false);
helpMenu.addSeparator();
createMenuItem(helpAboutNotepad,KeyEvent.VK_A,helpMenu,this);
MenuListener editMenuListener=new MenuListener()
{
public void menuSelected(MenuEvent evvvv)
{
if(Notepad.this.ta.getText().length()==0)
{
findItem.setEnabled(false);
findNextItem.setEnabled(false);
replaceItem.setEnabled(false);
selectAllItem.setEnabled(false);
gotoItem.setEnabled(false);
}
else
{
findItem.setEnabled(true);
findNextItem.setEnabled(true);
replaceItem.setEnabled(true);
selectAllItem.setEnabled(true);
gotoItem.setEnabled(true);
}
if(Notepad.this.ta.getSelectionStart()==ta.getSelectionEnd())
{
cutItem.setEnabled(false);
copyItem.setEnabled(false);
deleteItem.setEnabled(false);
}
else
{
cutItem.setEnabled(true);
copyItem.setEnabled(true);
deleteItem.setEnabled(true);
}
}
public void menuDeselected(MenuEvent evvvv){}
public void menuCanceled(MenuEvent evvvv){}
};
editMenu.addMenuListener(editMenuListener);
f.setJMenuBar(mb);
}
/*************Constructor**************/
////////////////////////////////////
public static void main(String[] s)
{
new Notepad();
}
}
/**************************************/
//public
interface MenuConstants
{
final String fileText="File";
final String editText="Edit";
final String formatText="Format";
final String viewText="View";
final String helpText="Help";
final String fileNew="New";
final String fileOpen="Open...";
final String fileSave="Save";
final String fileSaveAs="Save As...";
final String filePageSetup="Page Setup...";
final String filePrint="Print";
final String fileExit="Exit";
final String aboutText=
"<html><big>Your Notepad</big><hr><hr>"
+"<p align=center>Prepared by Ayush Ranjan Srivastava!</p>"
+"<hr><p align=center>I Used jdk1.8 to compile the source code.</p>"
+"<p align=center><strong>Thanx for using Notepad</strong></p>";
final String editCopy="Copy";
final String editPaste="Paste";
final String editDelete="Delete";
final String editFind="Find...";
final String editFindNext="Find Next";
final String editReplace="Replace";
final String editGoTo="Go To...";
final String editSelectAll="Select All";
final String editTimeDate="Time/Date";
final String formatWordWrap="Word Wrap";
final String formatFont="Font...";
final String formatForeground="Set Text color...";
final String formatBackground="Set Pad color...";
final String viewStatusBar="Status Bar";
final String helpHelpTopic="Help Topic";
final String helpAboutNotepad="About Notepad";
Now, here you just need to compile and run the above piece of code. Just remember jdk version should be above 1.7 .
FindDialogue.java
//package p1;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
/******************************************************/
class FindReplaceDemo extends JFrame
{
FindDialog dialog=null;
JTextArea ta;
JButton findButton,replaceButton;
FindReplaceDemo()
{
super("Find Demo");
ta=new JTextArea(7,20);
findButton=new JButton("Find text");
ActionListener ac1=new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
if(dialog==null)
dialog=new FindDialog(FindReplaceDemo.this.ta);
dialog.showDialog(FindReplaceDemo.this,true);//find
}
};
findButton.addActionListener(ac1);
replaceButton=new JButton("Replace text");
ActionListener ac2=new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
if(dialog==null)
dialog=new FindDialog(FindReplaceDemo.this.ta);
dialog.showDialog(FindReplaceDemo.this,false);//find
}
};
replaceButton.addActionListener(ac2);
add(ta,BorderLayout.CENTER);
add(replaceButton,BorderLayout.NORTH);
add(findButton,BorderLayout.SOUTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(50,50,400,400);
ta.append("Hello dear. how r u?");
ta.append("\nhey i said Hello and not hello or Hel or hello.");
ta.append("\nWell do u know what is the meaning of Hello");
ta.append("\n Hello is no hello but it is Hello");
ta.setCaretPosition(0);
setVisible(true);
}
////////////////////////////////
public static void main(String[] args)
{
new FindReplaceDemo();
}
}
/******************************************************/
public class FindDialog extends JPanel implements ActionListener
{
JTextArea jta;
public int lastIndex;
JLabel replaceLabel;
private TextField findWhat;
private JTextField replaceWith;
private JCheckBox matchCase;
JRadioButton up, down;
JButton findNextButton, replaceButton, replaceAllButton, cancelButton;
JPanel direction,buttonPanel, findButtonPanel, replaceButtonPanel;
CardLayout card;
private boolean ok;
private JDialog dialog;
///////////////////////
public FindDialog(JTextArea jta)
{
this.jta=jta;
findWhat=new TextField(20);
replaceWith=new JTextField(20);
matchCase=new JCheckBox("Match case");
up=new JRadioButton("Up");
down=new JRadioButton("Down");
down.setSelected(true);
ButtonGroup bg=new ButtonGroup();
bg.add(up);
bg.add(down);
direction=new JPanel();
Border etched=BorderFactory.createEtchedBorder();
Border titled=BorderFactory.createTitledBorder(etched,"Direction");
direction.setBorder(titled);
direction.setLayout(new GridLayout(1,2));
direction.add(up);
direction.add(down);
JPanel southPanel=new JPanel();
southPanel.setLayout(new GridLayout(1,2));
southPanel.add(matchCase);
southPanel.add(direction);
findNextButton=new JButton("Find Next");
replaceButton=new JButton("Replace");
replaceAllButton=new JButton("Replace All");
cancelButton=new JButton("Cancel");
/*
findButtonPanel=new JPanel();
findButtonPanel.setLayout(new GridLayout(2,1));
findButtonPanel.add(findNextButton);
findButtonPanel.add(cancelButton);
*/
replaceButtonPanel=new JPanel();
replaceButtonPanel.setLayout(new GridLayout(4,1));
replaceButtonPanel.add(findNextButton);
replaceButtonPanel.add(replaceButton);
replaceButtonPanel.add(replaceAllButton);
replaceButtonPanel.add(cancelButton);
/*
card=new CardLayout();
buttonPanel=new JPanel();
buttonPanel.setLayout(card);
buttonPanel.add(replaceButtonPanel,"replace");
buttonPanel.add(findButtonPanel,"find");
card.first(buttonPanel);
*/
JPanel textPanel=new JPanel();
textPanel.setLayout(new GridLayout(3,2));
textPanel.add(new JLabel("Find what "));
textPanel.add(findWhat);
textPanel.add(replaceLabel=new JLabel("Replace With "));
textPanel.add(replaceWith);
textPanel.add(new JLabel(" "));//dummy Lable
textPanel.add(new JLabel(" "));//dummy Lable
setLayout(new BorderLayout());
add(new JLabel(" "),BorderLayout.NORTH);//dummy label
add(textPanel,BorderLayout.CENTER);
add(replaceButtonPanel,BorderLayout.EAST);
add(southPanel,BorderLayout.SOUTH);
setSize(200,200);
findNextButton.addActionListener(this);
replaceButton.addActionListener(this);
replaceAllButton.addActionListener(this);
cancelButton.addActionListener(new ActionListener()
{public void actionPerformed(ActionEvent ev){dialog.setVisible(false);}});
findWhat.addFocusListener(
new FocusAdapter(){public void focusLost(FocusEvent te){enableDisableButtons();}});
findWhat.addTextListener(
new TextListener(){public void textValueChanged(TextEvent te){enableDisableButtons();}});
}
//////////////////////////
void enableDisableButtons()
{
if(findWhat.getText().length()==0)
{
findNextButton.setEnabled(false);
replaceButton.setEnabled(false);
replaceAllButton.setEnabled(false);
}
else
{
findNextButton.setEnabled(true);
replaceButton.setEnabled(true);
replaceAllButton.setEnabled(true);
}
}
///////////////////////////////////
public void actionPerformed(ActionEvent ev)
{
if(ev.getSource()==findNextButton)
findNextWithSelection();
else if(ev.getSource()==replaceButton)
replaceNext();
else if(ev.getSource()==replaceAllButton)
JOptionPane.showMessageDialog(null,"Total replacements made= "+replaceAllNext());
}
/////////////////////////
int findNext()
{
String s1=jta.getText();
String s2=findWhat.getText();
lastIndex=jta.getCaretPosition();
int selStart=jta.getSelectionStart();
int selEnd=jta.getSelectionEnd();
if(up.isSelected())
{
if(selStart!=selEnd)
lastIndex=selEnd-s2.length()-1;
/*****Notepad doesnt use the else part, but it should be, instead of using caretPosition.***
else
lastIndex=lastIndex-s2.length();
******/
if(!matchCase.isSelected())
lastIndex=s1.toUpperCase().lastIndexOf(s2.toUpperCase(),lastIndex);
else
lastIndex=s1.lastIndexOf(s2,lastIndex);
}
else
{
if(selStart!=selEnd)
lastIndex=selStart+1;
if(!matchCase.isSelected())
lastIndex=s1.toUpperCase().indexOf(s2.toUpperCase(),lastIndex);
else
lastIndex=s1.indexOf(s2,lastIndex);
}
return lastIndex;
}
///////////////////////////////////////////////
public void findNextWithSelection()
{
int idx=findNext();
if(idx!=-1)
{
jta.setSelectionStart(idx);
jta.setSelectionEnd(idx+findWhat.getText().length());
}
else
JOptionPane.showMessageDialog(this,
"Cannot find"+" \""+findWhat.getText()+"\"",
"Find",JOptionPane.INFORMATION_MESSAGE);
}
//////////////////////////////////////////////
void replaceNext()
{
// if nothing is selectd
if(jta.getSelectionStart()==jta.getSelectionEnd())
{findNextWithSelection();return;}
String searchText=findWhat.getText();
String temp=jta.getSelectedText(); //get selected text
//check if the selected text matches the search text then do replacement
if(
(matchCase.isSelected() && temp.equals(searchText))
||
(!matchCase.isSelected() && temp.equalsIgnoreCase(searchText))
)
jta.replaceSelection(replaceWith.getText());
findNextWithSelection();
}
//////////////////////////////////////////////
int replaceAllNext()
{
if(up.isSelected())
jta.setCaretPosition(jta.getText().length()-1);
else
jta.setCaretPosition(0);
int idx=0;
int counter=0;
do
{
idx=findNext();
if(idx==-1) break;
counter++;
jta.replaceRange(replaceWith.getText(),idx,idx+findWhat.getText().length());
}while(idx!=-1);
return counter;
}
//////////////////////////////////////////////
public boolean showDialog(Component parent, boolean isFind )
{
Frame owner=null;
if(parent instanceof Frame)
owner=(Frame)parent;
else
owner=(Frame)SwingUtilities.getAncestorOfClass(Frame.class,parent);
if(dialog==null || dialog.getOwner()!=owner)
{
dialog=new JDialog(owner,false);
dialog.add(this);
dialog.getRootPane().setDefaultButton(findNextButton);
}
if(findWhat.getText().length()==0)
findNextButton.setEnabled(false);
else
findNextButton.setEnabled(true);
replaceButton.setVisible(false);
replaceAllButton.setVisible(false);
replaceWith.setVisible(false);
replaceLabel.setVisible(false);
if(isFind)
{
//card.show(buttonPanel,"find");
dialog.setSize(460,180);
dialog.setTitle("Find");
}
else
{
replaceButton.setVisible(true);
replaceAllButton.setVisible(true);
replaceWith.setVisible(true);
replaceLabel.setVisible(true);
//card.show(buttonPanel,"replace");
dialog.setSize(450,200);
dialog.setTitle("Replace");
}
dialog.setVisible(true);
//System.out.println(dialog.getWidth()+" "+dialog.getHeight());
return ok;
}
//////////////////////////////
}
FontChooser.java
//package p1;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
/******************************************************/
class FontDemo extends JFrame
{
FontChooser dialog=null;
JTextArea ta;
JButton fontButton;
FontDemo()
{
super("Font");
ta=new JTextArea(7,20);
fontButton=new JButton("Set Font");
ActionListener ac=new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
if(dialog==null)
dialog=new FontChooser(ta.getFont());
if(dialog.showDialog(FontDemo.this,"Choose a font"))
{
FontDemo.this.ta.setFont(dialog.createFont());
}
}
};
fontButton.addActionListener(ac);
add(ta,BorderLayout.CENTER);
add(fontButton,BorderLayout.SOUTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(50,50,400,400);
ta.append("Hello dear. how r u?");
ta.append("\n\n A quick brown fox jumps over the lazy dog.");
ta.append("\n\n0123456789");
ta.append("\n~!@#$%^&*()_+|?><");
setVisible(true);
}
////////////////////////////////
public static void main(String[] args)
{
new FontDemo();
}
}
/******************************************************/
public class FontChooser extends JPanel //implements ActionListener
{
private Font thisFont;
private JList jFace, jStyle, jSize;
private JDialog dialog;
private JButton okButton;
JTextArea tf;
private boolean ok;
public FontChooser(Font withFont)
{
thisFont=withFont;
////////////////////
String[] fontNames=
GraphicsEnvironment
.getLocalGraphicsEnvironment()
.getAvailableFontFamilyNames();
jFace=new JList(fontNames); jFace.setSelectedIndex(0);
jFace.addListSelectionListener(new ListSelectionListener()
{public void valueChanged(ListSelectionEvent ev){tf.setFont(createFont());}});
String[] fontStyles={"Regular","Italic","Bold","Bold Italic"};
jStyle=new JList(fontStyles);jStyle.setSelectedIndex(0);
jStyle.addListSelectionListener(new ListSelectionListener()
{public void valueChanged(ListSelectionEvent ev){tf.setFont(createFont());}});
String[] fontSizes=new String[30];
for(int j=0; j<30; j++)
fontSizes[j]=new String(10+j*2+"");
jSize=new JList(fontSizes); jSize.setSelectedIndex(0);
jSize.addListSelectionListener(new ListSelectionListener()
{public void valueChanged(ListSelectionEvent ev){tf.setFont(createFont());}});
JPanel jpLabel=new JPanel();
jpLabel.setLayout(new GridLayout(1,3));
jpLabel.add(new JLabel("Font",JLabel.CENTER));
jpLabel.add(new JLabel("Font Style",JLabel.CENTER));
jpLabel.add(new JLabel("Size",JLabel.CENTER));
JPanel jpList=new JPanel();
jpList.setLayout(new GridLayout(1,3));
jpList.add(new JScrollPane(jFace));
jpList.add(new JScrollPane(jStyle));
jpList.add(new JScrollPane(jSize));
okButton=new JButton("OK");
JButton cancelButton=new JButton("Cancel");
okButton.addActionListener(
new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
ok=true;
FontChooser.this.thisFont=FontChooser.this.createFont();
dialog.setVisible(false);
}
});
cancelButton.addActionListener(
new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
dialog.setVisible(false);
}
});
JPanel jpButton=new JPanel();
jpButton.setLayout(new FlowLayout());
jpButton.add(okButton);
jpButton.add(new JLabel(" "));//dummy Label
jpButton.add(cancelButton);
tf=new JTextArea(5,30);
JPanel jpTextField=new JPanel();
jpTextField.add(new JScrollPane(tf));
JPanel centerPanel=new JPanel();
centerPanel.setLayout(new GridLayout(2,1));
centerPanel.add(jpList);
centerPanel.add(jpTextField);
setLayout(new BorderLayout());
add(jpLabel,BorderLayout.NORTH);
add(centerPanel,BorderLayout.CENTER);
add(jpButton,BorderLayout.SOUTH);
add(new JLabel(" "),BorderLayout.EAST);//dummy label
add(new JLabel(" "),BorderLayout.WEST);//dummy label
tf.setFont(thisFont);
tf.append("\nA quick brown fox jumps over the lazy dog.");
tf.append("\n0123456789");
tf.append("\n~!@#$%^&*()_+|?><\n");
}
//////////////////////////
public Font createFont()
{
Font fnt=thisFont;
int fontstyle=Font.PLAIN;
int x=jStyle.getSelectedIndex();
switch(x)
{
case 0:
fontstyle=Font.PLAIN; break;
case 1:
fontstyle=Font.ITALIC; break;
case 2:
fontstyle=Font.BOLD; break;
case 3:
fontstyle=Font.BOLD+Font.ITALIC; break;
}
int fontsize=Integer.parseInt((String)jSize.getSelectedValue());
String fontname=(String)jFace.getSelectedValue();
fnt=new Font(fontname,fontstyle,fontsize);
return fnt;
}
//////////////////////////////////
public boolean showDialog(Component parent, String title)
{
ok=false;
Frame owner=null;
if(parent instanceof Frame)
owner=(Frame)parent;
else
owner=(Frame)SwingUtilities.getAncestorOfClass(Frame.class,parent);
if(dialog==null || dialog.getOwner()!=owner)
{
dialog=new JDialog(owner,true);
dialog.add(this);
dialog.getRootPane().setDefaultButton(okButton);
dialog.setSize(400,325);
}
dialog.setTitle(title);
dialog.setVisible(true);
//System.out.println(dialog.getWidth()+" "+dialog.getHeight());
return ok;
}
//////////////////////////////
}
LookAndFeelMenu.java
//package p1;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/***************************************************/
class LookAndFeelDemo extends JFrame
{
JLabel myLabel;
JMenuBar jmb;
JMenu fileMenu;
LookAndFeelDemo()
{
super("Look and Feel Demo");
add(myLabel=new JLabel("This is a Label"));
add(new JButton("Button"));
add(new JCheckBox("CheckBox"));
add(new JRadioButton("RadioButton"));
setLayout(new FlowLayout());
setSize(350,350);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
jmb=new JMenuBar();
setJMenuBar(jmb);
fileMenu=new JMenu("Look and Feel");
jmb.add(fileMenu);
LookAndFeelMenu.createLookAndFeelMenuItem(fileMenu,this);
setVisible(true);
}
////////////////////////
///////////////////////
public static void main(String[] args)
{
new LookAndFeelDemo();
}
////////////////////////
}
/************************/
public class LookAndFeelMenu
{
public static void createLookAndFeelMenuItem(JMenu jmenu,Component cmp)
{
final UIManager.LookAndFeelInfo[] infos=UIManager.getInstalledLookAndFeels();
JRadioButtonMenuItem rbm[]=new JRadioButtonMenuItem[infos.length];
ButtonGroup bg=new ButtonGroup();
JMenu tmp=new JMenu("Change Look and Feel");
tmp.setMnemonic('C');
for(int i=0; i<infos.length; i++)
{
rbm[i]=new JRadioButtonMenuItem(infos[i].getName());
rbm[i].setMnemonic(infos[i].getName().charAt(0));
tmp.add(rbm[i]);
bg.add(rbm[i]);
rbm[i].addActionListener(new LookAndFeelMenuListener(infos[i].getClassName(),cmp));
}
rbm[0].setSelected(true);
jmenu.add(tmp);
}
}
/**************************/
class LookAndFeelMenuListener implements ActionListener
{
String classname;
Component jf;
/////////////////////
LookAndFeelMenuListener(String cln,Component jf)
{
this.jf=jf;
classname=new String(cln);
}
/////////////////////
public void actionPerformed(ActionEvent ev)
{
try
{
UIManager.setLookAndFeel(classname);
SwingUtilities.updateComponentTreeUI(jf);
}
catch(Exception e){System.out.println(e);}
}
///////////////////////////////
}
/*************************/
MyFileFilter.java
//package p1;
import java.io.File;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.FileFilter;
/***************************************************/
class FileFilterDemo extends JFrame
{
JLabel myLabel;
JButton myButton;
JFileChooser chooser;
FileFilterDemo()
{
super("File Filter Demo");
myLabel=new JLabel("No file is choosed yet");
myButton=new JButton("Choose file");
ActionListener listener=
new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
if (FileFilterDemo.this.chooser==null)
chooser=new JFileChooser();
chooser.addChoosableFileFilter(new MyFileFilter(".java","Java Source Files(*.java)"));
chooser.addChoosableFileFilter(new MyFileFilter(".txt","Text Files(*.txt)"));
//filter=new MyFilter(); then filter is equivalent to select all files
if(chooser.showDialog(FileFilterDemo.this,"Select this")==JFileChooser.APPROVE_OPTION)
FileFilterDemo.this.myLabel.setText(chooser.getSelectedFile().getPath());
}
};
myButton.addActionListener(listener);
add(myLabel,"Center");
add(myButton,"South");
setSize(300,300);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args)
{
FileFilterDemo ffd=new FileFilterDemo();
ffd.setVisible(true);
}
}
/***************************************************/
public class MyFileFilter extends FileFilter
{
private String extension;
private String description;
////////////////
public MyFileFilter()
{
setExtension(null);
setDescription(null);
}
////////////////
public MyFileFilter(final String ext, final String desc)
{
setExtension(ext);
setDescription(desc);
}
////////////////
public boolean accept(File f)
{
final String filename=f.getName();
if( f.isDirectory() ||
extension==null ||
filename.toUpperCase()
.endsWith(extension.toUpperCase()))
return true;
return false;
}
////////////////
public String getDescription()
{
return description;
}
////////////////
public void setDescription(String desc)
{
if(desc==null)
description=new String("All Files(*.*)");
else
description=new String(desc);
}
////////////////
public void setExtension(String ext)
{
if(ext==null)
{extension=null; return;}
extension=new String(ext).toLowerCase();
if(!ext.startsWith("."))
extension="."+extension;
}
////////////////
}
/***************************************************/
Notepad.java
//package p1;
import java.io.*;
import java.util.Date;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
//import p1.FontChooser;
//import p1.FontDialog;
//import p1.FindDialog;
//import p1.LookAndFeelMenu;
//import p1.MyFileFilter;
/************************************/
class FileOperation
{
Notepad npd;
boolean saved;
boolean newFileFlag;
String fileName;
String applicationTitle="Notepad";
File fileRef;
JFileChooser chooser;
/////////////////////////////
boolean isSave(){return saved;}
void setSave(boolean saved){this.saved=saved;}
String getFileName(){return new String(fileName);}
void setFileName(String fileName){this.fileName=new String(fileName);}
/////////////////////////
FileOperation(Notepad npd)
{
this.npd=npd;
saved=true;
newFileFlag=true;
fileName=new String("New File");
fileRef=new File(fileName);
this.npd.f.setTitle(fileName+" - "+applicationTitle);
chooser=new JFileChooser();
chooser.addChoosableFileFilter(new MyFileFilter(".java","Java Source Files(*.java)"));
chooser.addChoosableFileFilter(new MyFileFilter(".txt","Text Files(*.txt)"));
chooser.setCurrentDirectory(new File("."));
}
//////////////////////////////////////
boolean saveFile(File temp)
{
FileWriter fout=null;
try
{
fout=new FileWriter(temp);
fout.write(npd.ta.getText());
}
catch(IOException ioe){updateStatus(temp,false);return false;}
finally
{try{fout.close();}catch(IOException excp){}}
updateStatus(temp,true);
return true;
}
////////////////////////
boolean saveThisFile()
{
if(!newFileFlag)
{return saveFile(fileRef);}
return saveAsFile();
}
////////////////////////////////////
boolean saveAsFile()
{
File temp=null;
chooser.setDialogTitle("Save As...");
chooser.setApproveButtonText("Save Now");
chooser.setApproveButtonMnemonic(KeyEvent.VK_S);
chooser.setApproveButtonToolTipText("Click me to save!");
do
{
if(chooser.showSaveDialog(this.npd.f)!=JFileChooser.APPROVE_OPTION)
return false;
temp=chooser.getSelectedFile();
if(!temp.exists()) break;
if( JOptionPane.showConfirmDialog(
this.npd.f,"<html>"+temp.getPath()+" already exists.<br>Do you want to replace it?<html>",
"Save As",JOptionPane.YES_NO_OPTION
)==JOptionPane.YES_OPTION)
break;
}while(true);
return saveFile(temp);
}
////////////////////////
boolean openFile(File temp)
{
FileInputStream fin=null;
BufferedReader din=null;
try
{
fin=new FileInputStream(temp);
din=new BufferedReader(new InputStreamReader(fin));
String str=" ";
while(str!=null)
{
str=din.readLine();
if(str==null)
break;
this.npd.ta.append(str+"\n");
}
}
catch(IOException ioe){updateStatus(temp,false);return false;}
finally
{try{din.close();fin.close();}catch(IOException excp){}}
updateStatus(temp,true);
this.npd.ta.setCaretPosition(0);
return true;
}
///////////////////////
void openFile()
{
if(!confirmSave()) return;
chooser.setDialogTitle("Open File...");
chooser.setApproveButtonText("Open this");
chooser.setApproveButtonMnemonic(KeyEvent.VK_O);
chooser.setApproveButtonToolTipText("Click me to open the selected file.!");
File temp=null;
do
{
if(chooser.showOpenDialog(this.npd.f)!=JFileChooser.APPROVE_OPTION)
return;
temp=chooser.getSelectedFile();
if(temp.exists()) break;
JOptionPane.showMessageDialog(this.npd.f,
"<html>"+temp.getName()+"<br>file not found.<br>"+
"Please verify the correct file name was given.<html>",
"Open", JOptionPane.INFORMATION_MESSAGE);
} while(true);
this.npd.ta.setText("");
if(!openFile(temp))
{
fileName="New File"; saved=true;
this.npd.f.setTitle(fileName+" - "+applicationTitle);
}
if(!temp.canWrite())
newFileFlag=true;
}
////////////////////////
void updateStatus(File temp,boolean saved)
{
if(saved)
{
this.saved=true;
fileName=new String(temp.getName());
if(!temp.canWrite())
{fileName+="(Read only)"; newFileFlag=true;}
fileRef=temp;
npd.f.setTitle(fileName + " - "+applicationTitle);
npd.statusBar.setText("File : "+temp.getPath()+" saved/opened successfully.");
newFileFlag=false;
}
else
{
npd.statusBar.setText("Failed to save/open : "+temp.getPath());
}
}
///////////////////////
boolean confirmSave()
{
String strMsg="<html>The text in the "+fileName+" file has been changed.<br>"+
"Do you want to save the changes?<html>";
if(!saved)
{
int x=JOptionPane.showConfirmDialog(this.npd.f,strMsg,applicationTitle,JOptionPane.YES_NO_CANCEL_OPTION);
if(x==JOptionPane.CANCEL_OPTION) return false;
if(x==JOptionPane.YES_OPTION && !saveAsFile()) return false;
}
return true;
}
///////////////////////////////////////
void newFile()
{
if(!confirmSave()) return;
this.npd.ta.setText("");
fileName=new String("Untitled");
fileRef=new File(fileName);
saved=true;
newFileFlag=true;
this.npd.f.setTitle(fileName+" - "+applicationTitle);
}
//////////////////////////////////////
}// end defination of class FileOperation
/************************************/
public class Notepad implements ActionListener, MenuConstants
{
JFrame f;
JTextArea ta;
JLabel statusBar;
private String fileName="New File";
private boolean saved=true;
String applicationName="Notepad";
String searchString, replaceString;
int lastSearchIndex;
FileOperation fileHandler;
FontChooser fontDialog=null;
FindDialog findReplaceDialog=null;
JColorChooser bcolorChooser=null;
JColorChooser fcolorChooser=null;
JDialog backgroundDialog=null;
JDialog foregroundDialog=null;
JMenuItem cutItem,copyItem, deleteItem, findItem, findNextItem, replaceItem, gotoItem, selectAllItem;
/****************************/
Notepad()
{
f=new JFrame(fileName+" - "+applicationName);
ta=new JTextArea(30,60);
statusBar=new JLabel("|| Ln 1, Col 1 ",JLabel.RIGHT);
f.add(new JScrollPane(ta),BorderLayout.CENTER);
f.add(statusBar,BorderLayout.SOUTH);
f.add(new JLabel(" "),BorderLayout.EAST);
f.add(new JLabel(" "),BorderLayout.WEST);
createMenuBar(f);
//f.setSize(350,350);
f.pack();
f.setLocation(100,50);
f.setVisible(true);
f.setLocation(150,50);
f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
fileHandler=new FileOperation(this);
/////////////////////
ta.addCaretListener(
new CaretListener()
{
public void caretUpdate(CaretEvent e)
{
int lineNumber=0, column=0, pos=0;
try
{
pos=ta.getCaretPosition();
lineNumber=ta.getLineOfOffset(pos);
column=pos-ta.getLineStartOffset(lineNumber);
}catch(Exception excp){}
if(ta.getText().length()==0){lineNumber=0; column=0;}
statusBar.setText("|| Ln "+(lineNumber+1)+", Col "+(column+1));
}
});
//////////////////
DocumentListener myListener = new DocumentListener()
{
public void changedUpdate(DocumentEvent e){fileHandler.saved=false;}
public void removeUpdate(DocumentEvent e){fileHandler.saved=false;}
public void insertUpdate(DocumentEvent e){fileHandler.saved=false;}
};
ta.getDocument().addDocumentListener(myListener);
/////////
WindowListener frameClose=new WindowAdapter()
{
public void windowClosing(WindowEvent we)
{
if(fileHandler.confirmSave())System.exit(0);
}
};
f.addWindowListener(frameClose);
//////////////////
/*
ta.append("Hello dear hello hi");
ta.append("\nwho are u dear mister hello");
ta.append("\nhello bye hel");
ta.append("\nHello");
ta.append("\nMiss u mister hello hell");
fileHandler.saved=true;
*/
}
////////////////////////////////////
void goTo()
{
int lineNumber=0;
try
{
lineNumber=ta.getLineOfOffset(ta.getCaretPosition())+1;
String tempStr=JOptionPane.showInputDialog(f,"Enter Line Number:",""+lineNumber);
if(tempStr==null)
{return;}
lineNumber=Integer.parseInt(tempStr);
ta.setCaretPosition(ta.getLineStartOffset(lineNumber-1));
}catch(Exception e){}
}
///////////////////////////////////
public void actionPerformed(ActionEvent ev)
{
String cmdText=ev.getActionCommand();
////////////////////////////////////
if(cmdText.equals(fileNew))
fileHandler.newFile();
else if(cmdText.equals(fileOpen))
fileHandler.openFile();
////////////////////////////////////
else if(cmdText.equals(fileSave))
fileHandler.saveThisFile();
////////////////////////////////////
else if(cmdText.equals(fileSaveAs))
fileHandler.saveAsFile();
////////////////////////////////////
else if(cmdText.equals(fileExit))
{if(fileHandler.confirmSave())System.exit(0);}
////////////////////////////////////
else if(cmdText.equals(filePrint))
JOptionPane.showMessageDialog(
Notepad.this.f,
"Get ur printer repaired first! It seems u dont have one!",
"Bad Printer",
JOptionPane.INFORMATION_MESSAGE
);
////////////////////////////////////
else if(cmdText.equals(editCut))
ta.cut();
////////////////////////////////////
else if(cmdText.equals(editCopy))
ta.copy();
////////////////////////////////////
else if(cmdText.equals(editPaste))
ta.paste();
////////////////////////////////////
else if(cmdText.equals(editDelete))
ta.replaceSelection("");
////////////////////////////////////
else if(cmdText.equals(editFind))
{
if(Notepad.this.ta.getText().length()==0)
return; // text box have no text
if(findReplaceDialog==null)
findReplaceDialog=new FindDialog(Notepad.this.ta);
findReplaceDialog.showDialog(Notepad.this.f,true);//find
}
////////////////////////////////////
else if(cmdText.equals(editFindNext))
{
if(Notepad.this.ta.getText().length()==0)
return; // text box have no text
if(findReplaceDialog==null)
statusBar.setText("Nothing to search for, use Find option of Edit Menu first !!!!");
else
findReplaceDialog.findNextWithSelection();
}
////////////////////////////////////
else if(cmdText.equals(editReplace))
{
if(Notepad.this.ta.getText().length()==0)
return; // text box have no text
if(findReplaceDialog==null)
findReplaceDialog=new FindDialog(Notepad.this.ta);
findReplaceDialog.showDialog(Notepad.this.f,false);//replace
}
////////////////////////////////////
else if(cmdText.equals(editGoTo))
{
if(Notepad.this.ta.getText().length()==0)
return; // text box have no text
goTo();
}
////////////////////////////////////
else if(cmdText.equals(editSelectAll))
ta.selectAll();
////////////////////////////////////
else if(cmdText.equals(editTimeDate))
ta.insert(new Date().toString(),ta.getSelectionStart());
////////////////////////////////////
else if(cmdText.equals(formatWordWrap))
{
JCheckBoxMenuItem temp=(JCheckBoxMenuItem)ev.getSource();
ta.setLineWrap(temp.isSelected());
}
////////////////////////////////////
else if(cmdText.equals(formatFont))
{
if(fontDialog==null)
fontDialog=new FontChooser(ta.getFont());
if(fontDialog.showDialog(Notepad.this.f,"Choose a font"))
Notepad.this.ta.setFont(fontDialog.createFont());
}
////////////////////////////////////
else if(cmdText.equals(formatForeground))
showForegroundColorDialog();
////////////////////////////////////
else if(cmdText.equals(formatBackground))
showBackgroundColorDialog();
////////////////////////////////////
else if(cmdText.equals(viewStatusBar))
{
JCheckBoxMenuItem temp=(JCheckBoxMenuItem)ev.getSource();
statusBar.setVisible(temp.isSelected());
}
////////////////////////////////////
else if(cmdText.equals(helpAboutNotepad))
{
JOptionPane.showMessageDialog(Notepad.this.f,aboutText,"About",JOptionPane.INFORMATION_MESSAGE);
}
else
statusBar.setText("This "+cmdText+" command is yet to be implemented");
}//action Performed
////////////////////////////////////
void showBackgroundColorDialog()
{
if(bcolorChooser==null)
bcolorChooser=new JColorChooser();
if(backgroundDialog==null)
backgroundDialog=JColorChooser.createDialog
(Notepad.this.f,
formatBackground,
false,
bcolorChooser,
new ActionListener()
{public void actionPerformed(ActionEvent evvv){
Notepad.this.ta.setBackground(bcolorChooser.getColor());}},
null);
backgroundDialog.setVisible(true);
}
////////////////////////////////////
void showForegroundColorDialog()
{
if(fcolorChooser==null)
fcolorChooser=new JColorChooser();
if(foregroundDialog==null)
foregroundDialog=JColorChooser.createDialog
(Notepad.this.f,
formatForeground,
false,
fcolorChooser,
new ActionListener()
{public void actionPerformed(ActionEvent evvv){
Notepad.this.ta.setForeground(fcolorChooser.getColor());}},
null);
foregroundDialog.setVisible(true);
}
///////////////////////////////////
JMenuItem createMenuItem(String s, int key,JMenu toMenu,ActionListener al)
{
JMenuItem temp=new JMenuItem(s,key);
temp.addActionListener(al);
toMenu.add(temp);
return temp;
}
////////////////////////////////////
JMenuItem createMenuItem(String s, int key,JMenu toMenu,int aclKey,ActionListener al)
{
JMenuItem temp=new JMenuItem(s,key);
temp.addActionListener(al);
temp.setAccelerator(KeyStroke.getKeyStroke(aclKey,ActionEvent.CTRL_MASK));
toMenu.add(temp);
return temp;
}
////////////////////////////////////
JCheckBoxMenuItem createCheckBoxMenuItem(String s, int key,JMenu toMenu,ActionListener al)
{
JCheckBoxMenuItem temp=new JCheckBoxMenuItem(s);
temp.setMnemonic(key);
temp.addActionListener(al);
temp.setSelected(false);
toMenu.add(temp);
return temp;
}
////////////////////////////////////
JMenu createMenu(String s,int key,JMenuBar toMenuBar)
{
JMenu temp=new JMenu(s);
temp.setMnemonic(key);
toMenuBar.add(temp);
return temp;
}
/*********************************/
void createMenuBar(JFrame f)
{
JMenuBar mb=new JMenuBar();
JMenuItem temp;
JMenu fileMenu=createMenu(fileText,KeyEvent.VK_F,mb);
JMenu editMenu=createMenu(editText,KeyEvent.VK_E,mb);
JMenu formatMenu=createMenu(formatText,KeyEvent.VK_O,mb);
JMenu viewMenu=createMenu(viewText,KeyEvent.VK_V,mb);
JMenu helpMenu=createMenu(helpText,KeyEvent.VK_H,mb);
createMenuItem(fileNew,KeyEvent.VK_N,fileMenu,KeyEvent.VK_N,this);
createMenuItem(fileOpen,KeyEvent.VK_O,fileMenu,KeyEvent.VK_O,this);
createMenuItem(fileSave,KeyEvent.VK_S,fileMenu,KeyEvent.VK_S,this);
createMenuItem(fileSaveAs,KeyEvent.VK_A,fileMenu,this);
fileMenu.addSeparator();
temp=createMenuItem(filePageSetup,KeyEvent.VK_U,fileMenu,this);
temp.setEnabled(false);
createMenuItem(filePrint,KeyEvent.VK_P,fileMenu,KeyEvent.VK_P,this);
fileMenu.addSeparator();
createMenuItem(fileExit,KeyEvent.VK_X,fileMenu,this);
temp=createMenuItem(editUndo,KeyEvent.VK_U,editMenu,KeyEvent.VK_Z,this);
temp.setEnabled(false);
editMenu.addSeparator();
cutItem=createMenuItem(editCut,KeyEvent.VK_T,editMenu,KeyEvent.VK_X,this);
copyItem=createMenuItem(editCopy,KeyEvent.VK_C,editMenu,KeyEvent.VK_C,this);
createMenuItem(editPaste,KeyEvent.VK_P,editMenu,KeyEvent.VK_V,this);
deleteItem=createMenuItem(editDelete,KeyEvent.VK_L,editMenu,this);
deleteItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,0));
editMenu.addSeparator();
findItem=createMenuItem(editFind,KeyEvent.VK_F,editMenu,KeyEvent.VK_F,this);
findNextItem=createMenuItem(editFindNext,KeyEvent.VK_N,editMenu,this);
findNextItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0));
replaceItem=createMenuItem(editReplace,KeyEvent.VK_R,editMenu,KeyEvent.VK_H,this);
gotoItem=createMenuItem(editGoTo,KeyEvent.VK_G,editMenu,KeyEvent.VK_G,this);
editMenu.addSeparator();
selectAllItem=createMenuItem(editSelectAll,KeyEvent.VK_A,editMenu,KeyEvent.VK_A,this);
createMenuItem(editTimeDate,KeyEvent.VK_D,editMenu,this).setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,0));
createCheckBoxMenuItem(formatWordWrap,KeyEvent.VK_W,formatMenu,this);
createMenuItem(formatFont,KeyEvent.VK_F,formatMenu,this);
formatMenu.addSeparator();
createMenuItem(formatForeground,KeyEvent.VK_T,formatMenu,this);
createMenuItem(formatBackground,KeyEvent.VK_P,formatMenu,this);
createCheckBoxMenuItem(viewStatusBar,KeyEvent.VK_S,viewMenu,this).setSelected(true);
/************For Look and Feel, May not work properly on different operating environment***/
LookAndFeelMenu.createLookAndFeelMenuItem(viewMenu,this.f);
temp=createMenuItem(helpHelpTopic,KeyEvent.VK_H,helpMenu,this);
temp.setEnabled(false);
helpMenu.addSeparator();
createMenuItem(helpAboutNotepad,KeyEvent.VK_A,helpMenu,this);
MenuListener editMenuListener=new MenuListener()
{
public void menuSelected(MenuEvent evvvv)
{
if(Notepad.this.ta.getText().length()==0)
{
findItem.setEnabled(false);
findNextItem.setEnabled(false);
replaceItem.setEnabled(false);
selectAllItem.setEnabled(false);
gotoItem.setEnabled(false);
}
else
{
findItem.setEnabled(true);
findNextItem.setEnabled(true);
replaceItem.setEnabled(true);
selectAllItem.setEnabled(true);
gotoItem.setEnabled(true);
}
if(Notepad.this.ta.getSelectionStart()==ta.getSelectionEnd())
{
cutItem.setEnabled(false);
copyItem.setEnabled(false);
deleteItem.setEnabled(false);
}
else
{
cutItem.setEnabled(true);
copyItem.setEnabled(true);
deleteItem.setEnabled(true);
}
}
public void menuDeselected(MenuEvent evvvv){}
public void menuCanceled(MenuEvent evvvv){}
};
editMenu.addMenuListener(editMenuListener);
f.setJMenuBar(mb);
}
/*************Constructor**************/
////////////////////////////////////
public static void main(String[] s)
{
new Notepad();
}
}
/**************************************/
//public
interface MenuConstants
{
final String fileText="File";
final String editText="Edit";
final String formatText="Format";
final String viewText="View";
final String helpText="Help";
final String fileNew="New";
final String fileOpen="Open...";
final String fileSave="Save";
final String fileSaveAs="Save As...";
final String filePageSetup="Page Setup...";
final String filePrint="Print";
final String fileExit="Exit";
final String aboutText=
"<html><big>Your Notepad</big><hr><hr>"
+"<p align=center>Prepared by Ayush Ranjan Srivastava!</p>"
+"<hr><p align=center>I Used jdk1.8 to compile the source code.</p>"
+"<p align=center><strong>Thanx for using Notepad</strong></p>";
final String editUndo="Undo";
final String editCut="Cut";final String editCopy="Copy";
final String editPaste="Paste";
final String editDelete="Delete";
final String editFind="Find...";
final String editFindNext="Find Next";
final String editReplace="Replace";
final String editGoTo="Go To...";
final String editSelectAll="Select All";
final String editTimeDate="Time/Date";
final String formatWordWrap="Word Wrap";
final String formatFont="Font...";
final String formatForeground="Set Text color...";
final String formatBackground="Set Pad color...";
final String viewStatusBar="Status Bar";
final String helpHelpTopic="Help Topic";
final String helpAboutNotepad="About Notepad";
Now, here you just need to compile and run the above piece of code. Just remember jdk version should be above 1.7 .
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