import java.awt.Container; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.util.Random; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; public class MenuTest { public static void main(String[] args) { MenuFrame frame = new MenuFrame(); frame.setTitle("MenuTest"); frame.show(); } } class MenuFrame extends JFrame { public MenuFrame() { final int DEFAULT_FRAME_WIDTH = 300; final int DEFAULT_FRAME_HEIGHT = 300; setSize(DEFAULT_FRAME_WIDTH, DEFAULT_FRAME_HEIGHT); addWindowListener(new WindowCloser()); // add drawing panel to content pane panel = new RectanglePanel(); Container contentPane = getContentPane(); contentPane.add(panel, "Center"); // construct menu JMenuBar menuBar = new JMenuBar(); setJMenuBar(menuBar); JMenu fileMenu = new JMenu("File"); menuBar.add(fileMenu); MenuListener listener = new MenuListener(); newMenuItem = new JMenuItem("New"); fileMenu.add(newMenuItem); newMenuItem.addActionListener(listener); exitMenuItem = new JMenuItem("Exit"); fileMenu.add(exitMenuItem); exitMenuItem.addActionListener(listener); JMenu editMenu = new JMenu("Edit"); menuBar.add(editMenu); JMenuItem moveMenu = new JMenu("Move"); editMenu.add(moveMenu); upMenuItem = new JMenuItem("Up"); moveMenu.add(upMenuItem); upMenuItem.addActionListener(listener); downMenuItem = new JMenuItem("Down"); moveMenu.add(downMenuItem); downMenuItem.addActionListener(listener); leftMenuItem = new JMenuItem("Left"); moveMenu.add(leftMenuItem); leftMenuItem.addActionListener(listener); rightMenuItem = new JMenuItem("Right"); moveMenu.add(rightMenuItem); rightMenuItem.addActionListener(listener); randomizeMenuItem = new JMenuItem("Randomize"); editMenu.add(randomizeMenuItem); randomizeMenuItem.addActionListener(listener); } private JMenuItem exitMenuItem; private JMenuItem newMenuItem; private JMenuItem upMenuItem; private JMenuItem downMenuItem; private JMenuItem leftMenuItem; private JMenuItem rightMenuItem; private JMenuItem randomizeMenuItem; private RectanglePanel panel; private class MenuListener implements ActionListener { public void actionPerformed(ActionEvent event) { // find the menu that was selected Object source = event.getSource(); if (source == exitMenuItem) System.exit(0); else if (source == newMenuItem) panel.reset(); else if (source == upMenuItem) panel.moveRectangle(0, -1); else if (source == downMenuItem) panel.moveRectangle(0, 1); else if (source == leftMenuItem) panel.moveRectangle(-1, 0); else if (source == rightMenuItem) panel.moveRectangle(1, 0); else if (source == randomizeMenuItem) panel.randomize(); } } private class WindowCloser extends WindowAdapter { public void windowClosing(WindowEvent event) { System.exit(0); } } }