第一次用Editplus写程序

import javax.swing.*;import java.awt.*;import java.net.*;class myFrame extends JFrame{    private JMenuBar bar = new JMenuBar();    private JLabel userName = new JLabel("用户名");    private JLabel userPassword = new JLabel("密  码");    private JTextField user = new JTextField(20);    private JPasswordField password = new JPasswordField(20);    private String menuName[][] = {        {"文件","打开","保存","关闭"},        {"编辑","复制","粘贴","放弃"},        {"退出","嗯"}};    public myFrame(){        this.setSize(300,400);        this.setDefaultCloseOperation(EXIT_ON_CLOSE);        //实例化一个图像        URL url = this.getClass().getResource("/0001.png");        Image img = Toolkit.getDefaultToolkit().getImage(url);        this.setIconImage(img);        //添加菜单栏        this.setJMenuBar(bar);        for(int i =0 ;i<menuName.length ; i++){            JMenu menu = new JMenu(menuName[i][0]);            bar.add(menu);            for (int j=1;j<menuName[i].length ;j++ ){                menu.add(new JMenuItem(menuName[i][j]));            }        }        this.setLayout(new FlowLayout());        this.getContentPane().add(userName);        this.getContentPane().add(user);        this.getContentPane().add(userPassword);        this.getContentPane().add(password);        this.getContentPane().setBackground(Color.GREEN);        this.setVisible(true);    }}public class GuiTest {    public static void main(String[] args)     {        new myFrame();    }}

简单的可视化