ENGINEERING DICTIONARY: program to copy paste in java

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

class TextDemo extends Frame implements ActionListener,KeyListener,WindowListener
{
TextField tSrc,tDst;
Button bCpy,bMov,bSel,bClr;

TextDemo()
{
setTitle("TextDemo");
setSize(550,350);
setBackground(new Color(150,150,150));

tSrc=new TextField();
tSrc.setFont(new Font("lucida console",Font.PLAIN,18));

tDst=new TextField();
tDst.setFont(new Font("lucida console",Font.PLAIN,18));
tDst.setEditable(false);

bCpy=new Button("Copy");
bCpy.setFont(new Font("lucida console",Font.PLAIN,18));
bCpy.setBackground(new Color(255,190,190));
bCpy.setEnabled(false);

bMov=new Button("Move");
bMov.setFont(new Font("lucida console",Font.PLAIN,18));
bMov.setBackground(new Color(255,190,190));
bMov.setEnabled(false);

bSel=new Button("Copy Selected");
bSel.setFont(new Font("lucida console",Font.PLAIN,18));
bSel.setBackground(new Color(255,190,190));
bSel.setEnabled(false);

bClr=new Button("Clear");
bClr.setFont(new Font("lucida console",Font.PLAIN,18));
bClr.setBackground(new Color(190,255,190));

Label l1=new Label("Source");
l1.setFont(new Font("lucida console",Font.PLAIN,18));

Label l2=new Label("Destination");
l2.setFont(new Font("lucida console",Font.PLAIN,18));

setLayout(new GridLayout(4,1,10,10));

Panel p1=new Panel();
p1.setLayout(new BorderLayout(43,10));

p1.add(l1,BorderLayout.WEST);
p1.add(tSrc,BorderLayout.CENTER);

Panel p2=new Panel();
p2.setLayout(new BorderLayout(10,10));
p2.add(l2,BorderLayout.WEST);
p2.add(tDst,BorderLayout.CENTER);

Panel p3=new Panel();
p3.setLayout(new GridLayout(1,4,5,10));
p3.add(bCpy);
p3.add(bMov);
p3.add(bSel);
p3.add(bClr);

add(p1);
add(p2);
add(new Label());
add(p3);

bCpy.addActionListener(this);
bMov.addActionListener(this);
bSel.addActionListener(this);
bClr.addActionListener(this);
tSrc.addKeyListener(this);
addWindowListener(new MyWndAdapter(this));
}

public Insets getInsets()
{
return new Insets(50,20,20,20);
}

public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==bClr)
{
   tSrc.setText("");
   tDst.setText("");
   bCpy.setEnabled(false);
   bMov.setEnabled(false);
   bSel.setEnabled(false);
}
else
if(ae.getSource()==bCpy)
   tDst.setText(tSrc.getText());
else
if(ae.getSource()==bMov)
{
   tDst.setText(tSrc.getText());
   tSrc.setText("");
   bCpy.setEnabled(false);
   bMov.setEnabled(false);
   bSel.setEnabled(false);
}
else
if(ae.getSource()==bSel)
{
   tDst.setText(tSrc.getSelectedText());
}
}

public void keyTyped(KeyEvent ke){}
public void keyPressed(KeyEvent ke){}

public void keyReleased(KeyEvent ke)
{
if(tSrc.getText().length()==0)
{
   bCpy.setEnabled(false);
   bMov.setEnabled(false);
   bSel.setEnabled(false);
}
else
{
   bCpy.setEnabled(true);
   bMov.setEnabled(true);
   bSel.setEnabled(true);
}
}

    @Override
    public void windowOpened(WindowEvent e) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowClosing(WindowEvent e) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowClosed(WindowEvent e) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowIconified(WindowEvent e) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowDeiconified(WindowEvent e) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowActivated(WindowEvent e) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowDeactivated(WindowEvent e) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}
class MyWndAdapter extends WindowAdapter
{
TextDemo td;
MyWndAdapter(TextDemo td)
{
this.td=td;
}
public void windowClosing(WindowEvent we)
{
td.dispose();
System.exit(0);
}
}

class Text
{
public static void main(String arg[])
{
TextDemo td;
td=new TextDemo();
td.setVisible(true);
}
}

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steps to run the Demo program of Text

step1: save the file as textdemo.java file in the bin and refresh it.

step2: after that open ur command prompt and write the path of ur jdk

       like my jdk path is
       C:\java\jdk1.7.0_10\bin
step3: if u not know how to make path then follow the steps below