helpwindow.java

这是一个简单的图书管理系统,适用于教学中演示,讲解java高级编程语言

package lib_source;
import javax.swing.*;

import java.awt.*;
import java.awt.event.*;

import javax.swing.border.*;

public class HelpWindow extends JFrame implements ActionListener {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	public static final int WIDTH = 459;

	public static final int HEIGHT = 450;

	public HelpWindow() {
		setTitle("帮助窗口");
		setSize(WIDTH, HEIGHT);
		//setResizable(false);
		setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				dispose();
			}
		});
		Container content = getContentPane();
		String[] str={"images/船.gif","images/风景01.jpg"};
		JPanel jPanel ;
		for(int i=0;i<str.length;i++){
		jPanel = new JPanel();
		jPanel.setBorder(new BevelBorder(BevelBorder.RAISED));
		 jPanel.add(new JLabel(new ImageIcon(ClassLoader.getSystemResource(str[i]))));
		if(i==0) content.add(jPanel, BorderLayout.NORTH);
		else content.add(jPanel, BorderLayout.CENTER);}
		jPanel = new JPanel();
		jPanel.setBorder(new BevelBorder(BevelBorder.RAISED));
		JButton button = new JButton("关闭");
		button.addActionListener(this);
		jPanel.add(button);
		content.add(jPanel, BorderLayout.SOUTH);
		Dimension screen = getToolkit().getScreenSize();
	    pack();
		setLocation((screen.width - getSize().width) / 2,
				(screen.height - getSize().height) / 2);
	}

	public void actionPerformed(ActionEvent e) {
		if (e.getActionCommand().equals("关闭")) {
			dispose();
		}
		else JOptionPane.showMessageDialog(this,"按钮监听注册出现错误!");

	}
	public static void main(String[] args) {
		new HelpWindow().setVisible(true);
	}
}