Swing Components Java

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class MultipleSelection extends JFrame
{
private JList colorList, copyList;
private JButton copy;
private String colorNames[] =
{ "Black", "Blue", "Cyan", "Dark Gray", "Gray",
"Green", "Light Gray", "Magenta", "Orange", "Pink",
"Red", "White", "Yellow" };
public MultipleSelection()
{
super( "Multiple Selection Lists" );
Container c = getContentPane();
c.setLayout( new FlowLayout() );
colorList = new JList( colorNames );
colorList.setVisibleRowCount( 5 );
colorList.setFixedCellHeight( 15 );
colorList.setSelectionMode( ListSelectionModel.MULTIPLE_INTERVAL_SELECTION );
c.add( new JScrollPane( colorList ) );
// create copy button
copy = new JButton( "Copy >>>" );
copy.addActionListener( new ActionListener()
{
public void actionPerformed( ActionEvent e )
{
// place selected values in copyList
copyList.setListData( colorList.getSelectedValues() );
}
});
c.add( copy );
copyList = new JList( );
copyList.setVisibleRowCount( 5 );
copyList.setFixedCellWidth( 100 );
copyList.setFixedCellHeight( 15 );
copyList.setSelectionMode( ListSelectionModel.SINGLE_INTERVAL_SELECTION );
c.add( new JScrollPane( copyList ) );
setSize( 300, 120 );
show();
}
public static void main( String args[] )
{
MultipleSelection app = new MultipleSelection();
app.addWindowListener( new WindowAdapter()
{
public void windowClosing( WindowEvent e )
{
System.exit( 0 );
}
} );
}
}