4 课后答案【khdaw_lxywyl】(9)

1．顺序布局

顺序布局（Flow Layout）是最基本的一种布局，面板的默认布局就是顺序布局。顺序布局指的是把图形元件一个接一个地放在面板上。下面是一个顺序布局的例子。

package sample; import java.awt.*;

import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class MyFlowLayout { private Frame f;

private Button button1, button2, button3;

public static void main (String args[]) {

MyFlowLayout mflow = new MyFlowLayout (); o mflow.go(); }

c public void go() {

f = new Frame ("FlowLayout演示网

");

f.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent evt) { 案

.

f.setVisible(false); 答

w f.dispose(); System.exit(0); 后

} });

课

a //f.setLayout(new FlowLayout());

d

f.setLayout(new FlowLayout(FlowLayout.LEADINGh, 20, 20)); button1 = new Button("确定"); button2 = new Button("k打开"); button3 = new Button("关闭"); .

f.add(button1); f.add(button2); f.add(button3); w f.setSize (200,200); f.pack();

f.setVisible(true); } }

程序运行结果见图10-3。

8

m

ww