05：3种布局管理器

布局管理器

• 流式布局--FlowLayout

 1 package com.gui.lesson1;
 2 
 3 import java.awt.*;
 4 
 5 public class TestFlowLayout {
 6     public static void main(String[] args) {
 7         Frame frame = new Frame();
 8 
 9         //组件-按钮
10         Button button1 = new Button("button1");
11         Button button2 = new Button("button2");
12         Button button3 = new Button("button3");
13 
14         //设置为流式布局
15         frame.setLayout(new FlowLayout(FlowLayout.LEFT));
16 
17         frame.setSize(200, 200);
18 
19         //把按钮添加上去
20         frame.add(button1);
21         frame.add(button2);
22         frame.add(button3);
23 
24         frame.setVisible(true);
25     }
26 }

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• 东西南北中--BorderLayout

 1 package com.gui.lesson1;
 2 
 3 import java.awt.*;
 4 
 5 public class TestBorderLayout {
 6     public static void main(String[] args) {
 7         Frame frame = new Frame("BorderLayout");
 8 
 9         Button east = new Button("East");
10         Button west = new Button("West");
11         Button south = new Button("South");
12         Button north = new Button("North");
13         Button center = new Button("Center");
14 
15         //把按钮添加到对应的位置
16         frame.add(east, BorderLayout.EAST);
17         frame.add(west, BorderLayout.WEST);
18         frame.add(south, BorderLayout.SOUTH);
19         frame.add(north, BorderLayout.NORTH);
20         frame.add(center, BorderLayout.CENTER);
21 
22         frame.setSize(200, 200);
23         frame.setVisible(true);
24     }
25 }

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• 表格布局--GridLayout

 1 package com.gui.lesson1;
 2 
 3 import java.awt.*;
 4 
 5 public class TestGridLayout {
 6     public static void main(String[] args) {
 7         Frame frame = new Frame("GridLayout");
 8 
 9         Button btn1 = new Button("btn1");
10         Button btn2 = new Button("btn2");
11         Button btn3 = new Button("btn3");
12         Button btn4 = new Button("btn4");
13         Button btn5 = new Button("btn5");
14         Button btn6 = new Button("btn6");
15 
16         frame.setLayout(new GridLayout(3, 2));
17 
18         frame.add(btn1);
19         frame.add(btn2);
20         frame.add(btn3);
21         frame.add(btn4);
22         frame.add(btn5);
23         frame.add(btn6);
24 
25         //Java函数！会将布局自动的选一个最优秀的位置来确定，相当于自动布局
26         frame.pack();
27         frame.setVisible(true);
28     }
29 }

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