test.java

来自「《Java2图形设计卷II：Swing》配套光盘源码」· Java 代码 · 共 72 行

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

public class Test extends JApplet {
	public void init() {
		Container contentPane = getContentPane();

		final JMenuBar mb = new JMenuBar();
		JMenu fileMenu = new JMenu("File");
		JMenu editMenu = new JMenu("Edit");
		JMenuItem exitItem = new JMenuItem("Exit");
		JButton compButton = new JButton(
								"show menubar components ...");
		JButton menuButton = new JButton(
								"show menubar menus ...");

		fileMenu.add("New ...");
		fileMenu.add("Open ...");
		fileMenu.add("Save");
		fileMenu.add("Save As ..");
		fileMenu.addSeparator();
		fileMenu.add(exitItem);

		editMenu.add("Undo");
		editMenu.addSeparator();
		editMenu.add("Cut");
		editMenu.add("Copy");
		editMenu.add("Paste");

		mb.setMargin(new Insets(30,20,10,5));
		mb.add(new JLabel(new ImageIcon("smiley.gif")));
		mb.add(fileMenu);
		mb.add(editMenu);

		setJMenuBar(mb);
		contentPane.setLayout(new FlowLayout());
		contentPane.add(compButton);
		contentPane.add(menuButton);

		exitItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		});
		menuButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				Component c;
				int cnt = mb.getMenuCount();

				for(int i=0; i < cnt; ++i) {
					c = mb.getMenu(i);
					System.out.println(c);
					System.out.println();
				}
			}
		});
		compButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				Component c;
				int cnt = mb.getComponentCount();

				for(int i=0; i < cnt; ++i) {
					c = mb.getComponentAtIndex(i);
					System.out.println(c);
					System.out.println();
				}
			}
		});
	}
}