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

public class JListExample			// creates a scrollable pane with a JList
{
	public static void main(String[] args)
	{
		JFrame frame=new JFrame("");
		frame.setSize(350,200);
		JLPanel p=new JLPanel();
		frame.add(p);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}
	
	public static class JLPanel extends JPanel implements ListSelectionListener   // JList causes a ListSelectionEvent
	{
		private JLabel lab;			// used to output the selected entries from the JList
		private JList list;			// JList will just be a bunch of letters stored as Strings
		private String[] items={"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M"};		// the values for the JList
		
		public JLPanel()
		{
			lab=new JLabel("                         ");		// initialize the JLabel to be empty
			list=new JList<String>(items);						// create the JList consisting of the Strings in items
			JScrollPane jsp=new JScrollPane(list);				// place the JList in a scrollable pane
			list.addListSelectionListener(this);				// add a listener to the JList
			setLayout(new BorderLayout());						// put the JList and JLabel onto this JPanel
			add(jsp,BorderLayout.CENTER);
			add(lab,BorderLayout.EAST);
		}
		@SuppressWarnings("unchecked")				// needed because getSelectedValuesList returns a List<E>
		public void valueChanged(ListSelectionEvent e)		// method invoked if any JList item is selected or deselected
		{
			List<String> x=(List<String>)list.getSelectedValuesList();	// get all of the selected items as a List
			String outList="   ";										// this will be placed in the JLabel, start it off with a few blanks
			for(int i=0;i<x.size();i++) {outList+=x.get(i);}			// tack on each item in List onto our JLabel
			lab.setText(outList);							// redisplay the JLabel with the new selected items
		}
	}
}