java Application怎样编写？

新建类CloseFrame.java，代码如下：

import java.awt.BorderLayout;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JPanel;

public class CloseFrame extends JFrame implements ActionListener {

JMenuBar menu;

JMenu file;

JMenuItem closeMenu;

public CloseFrame() {

menu = new JMenuBar();

file = new JMenu("文件");

closeMenu = new JMenuItem("关闭");

closeMenu.addActionListener(this);

JButton closeButton = new JButton(" 关闭 ");

closeButton.addActionListener(this);

JPanel closePanel = new JPanel();

closePanel.setLayout(new FlowLayout());

closePanel.add(closeButton);

this.add(closePanel, BorderLayout.CENTER);

this.add(menu, BorderLayout.NORTH);

menu.add(file);

file.add(closeMenu);

this.setBounds(200, 100, 200, 120);

this.setVisible(true);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }

public void actionPerformed(ActionEvent e) { System.exit(0);

}

public static void main(String[] args) { new CloseFrame();

}

}

通过上述代码就可以进行它的编写，我们可以根据其进行应用。