java swing设计简易文本编译器

java swing设计简易文本编译器

package java_Test;
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
public class Java_File extends JFrame implements ActionListener {
	Container con;
	JMenu menu;
	JMenuBar jb;
	JMenuItem item1,item2,item3;
	public static void main(String[] args) {
		Java_File frame = new Java_File();
		frame.setVisible(true);
	}
	public Java_File() {
		setBounds(100, 100, 400, 300);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		jb = new JMenuBar();
		menu = new JMenu("文件");
		item1 = new JMenuItem("打开");
		item2 = new JMenuItem("保存");
		item3 = new JMenuItem("退出");
		item1.addActionListener(this);
		item2.addActionListener(this);
		item3.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				System.exit(0);
			}
		});
		menu.add(item1);
		menu.add(item2);
		menu.add(item3);
		jb.add(menu);
		setJMenuBar(jb);
		
		con = getContentPane();
		con .setLayout(new FlowLayout());
		//button1 = new JButton("打开文件");
		//button2 = new JButton("保存文件");
		//button1.addActionListener(this);
		//button2.addActionListener(this);
	}
	public void actionPerformed(ActionEvent e) {
		JFileChooser f = new JFileChooser();  //创建一个指向用户默认目录的文本对话框
		f.showOpenDialog(this);     //showOpenDialog(Component parent) 显示文件打开对话框,参数是父组件对象
		if(e.getSource() == item1) {	//获取触发对象
			if(JFileChooser.APPROVE_OPTION == f.showOpenDialog(this))
				JOptionPane.showConfirmDialog(this, "你确定要打开吗?");
		}
		if(e.getSource() == item2) {
			f.showSaveDialog(this); //showSaveDialog(Component parent)显示文件保存对话框,参数是父组件对象
		}
	}
}