centerpanel.java

这是上学堂马士兵老师教授的javaSE的所有源代码

import java.awt.*;

public class CenterPanel {
  public static void main(String args[]) {
    new MyFrame3(300,300,400,300,Color.BLUE);
  }
}

class MyFrame3 extends Frame{
  private Panel p;
  MyFrame3(int x,int y,int w,int h,Color c){
    super("FrameWithPanel");
    setLayout(null);
    setBounds(x,y,w,h);
    setBackground(c);
    p = new Panel(null); 
    p.setBounds(w/4,h/4,w/2,h/2);
    p.setBackground(Color.YELLOW);
    add(p);
    setVisible(true);
  }
}