Java Reference
In-Depth Information
Display 17.14
A GUI with a Menu
(part 1 of 3)
1
import
javax.swing.JFrame;
2
import
javax.swing.JPanel;
3
import
java.awt.GridLayout;
4
import
java.awt.Color;
5
import
javax.swing.JMenu;
6
import
javax.swing.JMenuItem;
7
import
javax.swing.JMenuBar;
8
import
java.awt.event.ActionListener;
9
import
java.awt.event.ActionEvent;
10
public class
MenuDemo
extends
JFrame
implements
ActionListener
11
{
12
public static final int
WIDTH = 300;
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public static final int
HEIGHT = 200;
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private
JPanel greenPanel;
15
private
JPanel whitePanel;
16
private
JPanel grayPanel;
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public static void
main(String[] args)
18
{
19
MenuDemo gui =
new
MenuDemo();
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gui.setVisible(
true
);
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}
22
public
MenuDemo()
23
{
24
super
("Menu Demonstration");
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setSize(WIDTH, HEIGHT);
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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setLayout(
new
GridLayout(1, 3));
28
greenPanel =
new
JPanel();
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greenPanel.setBackground(Color.LIGHT_GRAY);
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add(greenPanel);
31
whitePanel =
new
JPanel();
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whitePanel.setBackground(Color.LIGHT_GRAY);
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add(whitePanel);