问题描述

Java中BorderLayout的一些奇怪问题。。。

BorderLayout布局的JPanel为什么不能多次“嵌套”？求高手指点

public class Test extends JFrame{private BorderLayout borderLayout = new BorderLayout(50);private JPanel p1 = new JPanel();private JPanel p2 = new JPanel();public Test() {    this.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);    this.p1.setLayout(borderLayout);    this.p2.setLayout(borderLayout);    this.p1.add(new JButton(""RRRR"")BorderLayout.NORTH);    this.p1.add(new JButton(""qqqq"")BorderLayout.CENTER);    this.p1.add(new JButton(""www"")BorderLayout.SOUTH);    this.p2.add(p1BorderLayout.NORTH);    this.add(p2);    this.setSize (400600);    this.setVisible(true);}public static void main(String[] args){    Test t = new Test();}

}