SimpleList2.java Source code

Introduction

Here is the source code for SimpleList2.java

Source

/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly 
*/

// SimpleList2.java
//A variation on SimpleList. This version modifies the selecion model used.
//

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.DefaultListSelectionModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class SimpleList2 extends JPanel {

    String label[] = { "Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten",
            "Eleven" };

    JList list;

    public SimpleList2() {
        setLayout(new BorderLayout());

        list = new JList(label);
        JButton button = new JButton("Print");
        JScrollPane pane = new JScrollPane(list);

        DefaultListSelectionModel m = new DefaultListSelectionModel();
        m.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        m.setLeadAnchorNotificationEnabled(false);
        list.setSelectionModel(m);

        list.addListSelectionListener(new ListSelectionListener() {
            public void valueChanged(ListSelectionEvent e) {
                System.out.println(e.toString());
            }
        });
        button.addActionListener(new PrintListener());

        add(pane, BorderLayout.NORTH);
        add(button, BorderLayout.SOUTH);
    }

    public static void main(String s[]) {
        JFrame frame = new JFrame("List Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(new SimpleList2());
        frame.pack();
        frame.setVisible(true);
    }

    // An inner class to respond to clicks on the Print button
    class PrintListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            int selected[] = list.getSelectedIndices();
            System.out.println("Selected Elements:  ");

            for (int i = 0; i < selected.length; i++) {
                String element = (String) list.getModel().getElementAt(selected[i]);
                System.out.println("  " + element);
            }
        }
    }
}