测试布局管理器的嵌套使用

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Panel;


/**
 * 测试布局管理器的嵌套使用
 * @author Chenkunqing
 *
 */
public class TestLayouts {
public static void main(String[] args) {
new MyFrame4();
}
}
class MyFrame4 extends Frame{
public MyFrame4(){
Button b5 = new Button("Button5");
Panel panel = new Panel();
panel.add(new Button("button1"));
panel.add(new Button("button2"));
panel.add(new Button("button3"));
panel.add(new Button("button4"));
GridLayout gp = new GridLayout(2,2,5,5);
//设置panel的布局GridLayout为2*2且行高跟边距都为5.
panel.setLayout(gp);

this.add(b5,BorderLayout.NORTH);
this.add(panel,BorderLayout.CENTER);
//让Button5在上边，panel组成的按钮集在下边，就可以做成这样的合成图
this.setBounds(300,300,400,400);
this.setVisible(true);
}
}