/*
	The program demonstrate the use of a list
	In addition we are able to select more than one from the list
	
*
*/

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

public class SelectLists extends JFrame
{
	JPanel panel;
	JScrollPane scroll;
	JList list;
	JLabel msg;
	JButton ok;
	
	public SelectLists()
	{
		// Sets the title of the window
		
		setTitle("JList Window");
		
		// Sets the size of the window
		
		setSize(300, 400);
		
		// Sets the action when the window close
		
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		// Sets the label of the window
		
		msg = new JLabel("Here are the months");
		
		// Creates a OK button
		
		ok = new JButton("OK");
		
		// Create a String of array
		
		String[] months = {"Jan.", "Feb.", "March", "April", "May", "June",
								 "July", "Aug.", "Sept.", "Oct.", "Nov.", "Dec."};
								
	   // Adds the array of string into the list
		
		list = new JList(months);
		
		// Sets the visibility of the list
		
		list.setVisibleRowCount(5);
		
		// Adds the list to a scroll pane
		
		JScrollPane scroll = new JScrollPane(list);
		
		// Adds the scroll pane, the label and OK button to a panel
		
		panel = new JPanel();
		panel.add(msg);
		panel.add(scroll);
		panel.add(ok);
		
		// Adds the panel to a content pane
		
		add(panel);
		
		// Creates a single selection mode
		
		list.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
		
		// Creates an event listener
		
		ok.addActionListener(new okButtonListener());
		
		// Set the window to be visible
		
		setVisible(true);
		
	}
	
	
	public class okButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			if(e.getSource()==ok)
			{
				Object[] select = list.getSelectedValues();
				
				String msg = "You have selected the following months: \n";
				
				// Using a loop to store the selection in the select array
				
				for(Object selection : select )
				{
					msg += (String)selection + "\n";
				}
				
				JOptionPane.showMessageDialog(null, msg);
				
				// Clears all the selection
				
				list.clearSelection();
				
			}
		}
	}
	
	public static void main(String[] args)
	{
		new SelectLists();
		
	}
}