GUI——Panel

测试：

TestPanel.java

import java.awt.*;

public class TestPanel {
     public static void main(String args[]) {
     		 Frame f = 
             new Frame("Java Frame with Panel");
         Panel p = new Panel(null);
         f.setLayout(null);
         f.setBounds(300,300,500,500);
         f.setBackground(new Color(0,0,102));
         p.setBounds(50,50,400,400);
         p.setBackground(new Color(204,204,255));
         f.add(p);
         f.setVisible(true);
    }
}

F:\java\gui>javac TestPanel.java

F:\java\gui>java TestPanel

测试：

TestMultiPanel.java

import java.awt.*;

public class TestMultiPanel {
    public static void main(String args[]) {
        new MyFrame2("MyFrameWithPanel",300,300,400,300);
    }
}


class MyFrame2 extends Frame{
    private Panel p1,p2,p3,p4;
    MyFrame2(String s,int x,int y,int w,int h){
        super(s);
        setLayout(null);
        p1 = new Panel(null); p2 = new Panel(null);
        p3 = new Panel(null); p4 = new Panel(null);
        p1.setBounds(0,0,w/2,h/2);
        p2.setBounds(0,h/2,w/2,h/2);
        p3.setBounds(w/2,0,w/2,h/2);
        p4.setBounds(w/2,h/2,w/2,h/2);
        p1.setBackground(Color.BLUE);
        p2.setBackground(Color.GREEN);
        p3.setBackground(Color.YELLOW);
        p4.setBackground(Color.MAGENTA);
        add(p1);add(p2);add(p3);add(p4);
        setBounds(x,y,w,h);
        setVisible(true);
    }
}

F:\java\gui>javac TestMultiPanel.java

F:\java\gui>java TestMultiPanel