面板

 1 package Layout;
 2 import java.awt.*;
 3 import javax.swing.*;
 4 public class MyJPanel extends JFrame {
 5     private JPanel p1 = new JPanel();//面板默认流式布局
 6     private JPanel p2 = new JPanel();
 7     private JButton b1 = new JButton("B1");
 8     private JButton b2 = new JButton("B2");
 9     private JButton b3 = new JButton("B3");
10     private JButton b4 = new JButton("B4");
11     private JButton b5 = new JButton("B5");
12     public MyJPanel(){
13     this.setTitle("用户界面");
14     this.setSize(500, 300);
15     this.setLocation(600,400);
16        p1.add(b1);
17        p1.add(b2);
18        p2.add(b4);
19        p2.add(b5);
20     this.add(p1,BorderLayout.NORTH);
21     this.add(b3,BorderLayout.CENTER);
22     this.add(p2,BorderLayout.SOUTH);
23     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
24     this.setVisible(true);
25     
26     
27 }
28     public static void main(String[] args) {
29     MyJPanel l = new MyJPanel();
30 
31     }
32 
33 }