1 import java.awt.BorderLayout;
2 import java.awt.FlowLayout;
3 import java.awt.Font;
4 import java.awt.GridLayout;
5 import javax.swing.JButton;
6 import javax.swing.JFrame;
7 import javax.swing.JLabel;
8
9 public class ShowTest extends JFrame{
10 public ShowTest(){
11
12 }
13 public static void main(String[] args){
14 ShowTest task = new ShowTest();
15 task.setTitle("TestLayout");
16 task.setSize(300, 300);
17 task.setLocationRelativeTo(null);
18 task.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
19 task.setVisible(true);
20 //task.testFlowLayout();
21 //task.testGridLayout();
22 //task.testBorderLayout();
23 }
24 public void testFlowLayout()
25 {
26 //FlowLayout(alignment:int, hap:int, vgap:int)对齐方式，水平间隔，垂直间隔。
27 setLayout(new FlowLayout(FlowLayout.LEFT, 10, 20));
28 JButton[] jbt = new JButton[9];
29 for (int i = 0; i < 9; i++) {
30 jbt[i] = new JButton("" + i);
31 jbt[i].setFont(new Font("SansSerif", Font.BOLD, 20));
32 add(jbt[i]);
33 }
34 }
35 public void testGridLayout(){
36 setLayout(new GridLayout(3, 3));
37 JButton[] jbt = new JButton[8];
38 for (int i = 0; i < 8; i++) {
39 jbt[i] = new JButton("" + i);
40 jbt[i].setFont(new Font("SansSerif", Font.BOLD, 20));
41 add(jbt[i]);
42 }
43 }
44 public void testBorderLayout(){
45 //BorderLayout(hgap:int, vgap:int)指定水平间隔和垂直间隔
46 setLayout(new BorderLayout(5, 10));
47 add(new JButton("East"), BorderLayout.EAST);
48 add(new JButton("South"), BorderLayout.SOUTH);
49 add(new JButton("West"), BorderLayout.WEST);
50 add(new JButton("North"), BorderLayout.NORTH);
51 add(new JButton("Center"), BorderLayout.CENTER);
52 }
53 }
task.testFlowLayout();
task.testGridLayout();
task.testBorderLayout();
