themain.java

来自「Java流的程序源码」· Java 代码 · 共 67 行

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

class theMain extends JFrame {
	private JMenuBar jmb;
	private JMenuItem add, show, about, exitframe;
	private JMenu jm;
	
	public theMain() {
		
		super("Main");
		jmb = new JMenuBar();
		setJMenuBar(jmb);
		jm = new JMenu("文件");
		
		add = new JMenuItem("学生信息录入");
		show = new JMenuItem("学生信息显示");
		about = new JMenuItem("关于");
		exitframe = new JMenuItem("退出");
		
		add.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				try {
					JFrame newframe = new Add();
					newframe.setSize(300,200);
					newframe.setLocation(380,240);
					newframe.setVisible(true);
				} catch (Exception e3) {
					System.out.println("调用Add,发生异常");
				}
			}
		});
		
		show.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				try {
					JFrame newframe = new Show();
					newframe.setSize(400, 150);
					newframe.setLocation(400,250);
					newframe.setVisible(true);
				} catch (Exception e2) {
					System.out.println("调用Show,发生异常");
				}
			}
		});
		
		about.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JOptionPane.showMessageDialog(null, " 一个简单的学生信息存储程序");
			}
		});
		
		exitframe.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		});
		
		jm.add(add);
		jm.add(show);
		jm.addSeparator();
		jm.add(about);
		jm.add(exitframe);
		jmb.add(jm);
	}
}