4 课后答案【khdaw_lxywyl】(10)

图10-3 顺序布局（Flow Layout） 2．边界布局

边界布局（Border Layout）包括5个区：北区、南区、东区、西区和中区。这5个区在面板上的分布规律是“上北下南，左西右东”。下面是一个边界布局的例子。

package sample; import java.awt.*;

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

Button east, south, west, north, center;

public static void main(String args[]) {

o MyBorderLayout mb = new MyBorderLayout(); mb.go(); } c

public void go() {

网

f = new Frame("BorderLayout 案

演示");

.

f.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent evt) { 答

w f.setVisible(false); f.dispose(); 后

System.exit(0); } 课

a }); d

f.setBounds(0, 0, 300, 300);

f.setLayout(new BorderLayout()); h

north = new Button("k.

北"); south = new Button("南"); east = new Button("东"); w west = new Button("西"); center = new Button("中");

f.add(BorderLayout.NORTH, north); f.add(BorderLayout.SOUTH, south); f.add(BorderLayout.EAST, east); f.add(BorderLayout.WEST, west); f.add(BorderLayout.CENTER, center);

f.setVisible(true); }

9

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