SWING(TextArea)

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class TextAreaDemo extends JFrame
{
private JTextArea t1, t2;
private JButton copy;

public TextAreaDemo()
{
super( "TextArea Demo" );

Box b = Box.createHorizontalBox();

String s = "This is a demo string to\n" +
"illustrate copying text\n" +
"from one TextArea to \n" +
"another TextArea using an\n"+
"external event\n";

t1 = new JTextArea( s, 10, 15 );
b.add( new JScrollPane( t1 ) );

copy = new JButton( "Copy >>>" );
copy.addActionListener( new ActionListener()
{
public void actionPerformed( ActionEvent e )
{
t2.setText( t1.getSelectedText() );
}
} );
b.add( copy );

t2 = new JTextArea( 10, 15 );
t2.setEditable( false );
b.add( new JScrollPane( t2 ) );

Container c = getContentPane();
c.add( b ); // Box placed in BorderLayout.CENTER
setSize( 425, 200 );
show();
}

public static void main( String args[] )
{
TextAreaDemo app = new TextAreaDemo();

app.addWindowListener( new WindowAdapter()
{
public void windowClosing( WindowEvent e )
{
System.exit( 0 );
}
} );
}
}