Java Jframe Jpanel画桌面程序及Jbutton点击监听事件 IT

下面只是一个使用小demo
  1 package cnom.test.testUtils;
  2 
  3 import java.awt.BorderLayout;
  4 import java.awt.Color;
  5 import java.awt.FlowLayout;
  6 import java.awt.Graphics;
  7 import java.awt.event.ActionEvent;
  8 import java.awt.event.ActionListener;
  9 
 10 import javax.swing.Box;
 11 import javax.swing.JButton;
 12 import javax.swing.JFrame;
 13 import javax.swing.JLabel;
 14 import javax.swing.JPanel;
 15 import javax.swing.JPasswordField;
 16 import javax.swing.JTextField;
 17 import javax.swing.WindowConstants;
 18 
 19 public class testJframeJpanel {
 20     public static void main(String[] args) {
 21         testJframe();
 22         //        testBox();
 23     }
 24 
 25     private static void testJframe() {
 26         JButton jb1, jb2, jb3, jb4, jb5, jb6;
 27         JPanel jp1, jp2;
 28         JFrame jf = new JFrame();
 29 
 30         jb1 = new JButton("西瓜");
 31         jb2 = new JButton("苹果");
 32         jb3 = new JButton("香蕉");
 33         jb4 = new JButton("荔枝");
 34         jb5 = new JButton("葡萄");
 35         jb6 = new JButton("桔子");
 36 
 37         final JTextField tf = new JTextField();
 38         tf.setBounds(50, 50, 150, 20);
 39         jb3.setBounds(100, 50, 65, 30);
 40         jb3.addActionListener(new ActionListener() {
 41             public void actionPerformed(ActionEvent e) {
 42                 tf.setText("This is Banana");
 43                 tf.setBackground(Color.cyan);
 44                 testBox();
 45             }
 46         });
 47 
 48         jp1 = new JPanel();
 49         jp2 = new JPanel();
 50 
 51         jp1.add(jb1);
 52         jp1.add(jb2);
 53         jp2.add(jb4);
 54         jp2.add(jb5);
 55         jp2.add(jb6);
 56 
 57         jf.add(jp1, BorderLayout.NORTH);
 58         jf.add(jp2, BorderLayout.SOUTH);
 59         jf.add(jb3);
 60         jf.add(tf);
 61 
 62         jf.setTitle("用户登录");
 63         jf.setSize(400, 200);
 64         jf.setLocation(300, 300);
 65         jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 66 
 67         jf.setVisible(true);
 68     }
 69 
 70     private static void testBox() {
 71         JFrame jf = new JFrame("用户登录");
 72         jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
 73 
 74         // 第 1 个 JPanel, 使用默认的浮动布局
 75         JPanel panel01 = new JPanel();
 76         panel01.add(new JLabel("用户名"));
 77         JTextField username = new JTextField(10);
 78         panel01.add(username);
 79 
 80         // 第 2 个 JPanel, 使用默认的浮动布局
 81         JPanel panel02 = new JPanel();
 82         panel02.add(new JLabel("密  码"));
 83         panel02.add(new JPasswordField(10));
 84 
 85         // 第 3 个 JPanel, 使用浮动布局, 并且容器内组件居中显示
 86         JPanel panel03 = new JPanel(new FlowLayout(FlowLayout.CENTER));
 87         JButton loginButton = new JButton("登录");
 88         panel03.add(loginButton);
 89         panel03.add(new JButton("注册"));
 90 
 91         loginButton.addActionListener(new ActionListener() {
 92 
 93             @Override
 94             public void actionPerformed(ActionEvent e) {
 95                 System.out.println("username=" + username.getText());
 96             }
 97 
 98         });
 99 
100         Box vBox = Box.createVerticalBox();
101         vBox.add(panel01);
102         vBox.add(panel02);
103         vBox.add(panel03);
104 
105         jf.setContentPane(vBox);
106         jf.setSize(400, 200);
107         jf.pack();
108         jf.setLocationRelativeTo(null);
109         jf.setVisible(true);
110 
111     }
112 }