GUI之Panel测试程序

GUI之Panel测试程序

Panel对象可以看成可以容纳Component的空间

Panel对象可以拥有自己的布局管理器

Panel类拥有从父类继承而来的方法

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);
		 //设置frame位置和大小
         f.setBounds(300,300,500,500);
		 //设置Frame背景色
         f.setBackground(new Color(0,0,102));
		 //设置Panel位置和大小
         p.setBounds(50,50,400,400);
		 //设置Panel的背景色
         p.setBackground(new Color(204,204,255));
		 //将panel添加到Frame
         f.add(p);
		 //设置是否可见,true代表可见
         f.setVisible(true);
    }
}

 

 

实例2,多个Panel

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);
    }
}



 

 练习测试:

CenterPanel.java

import java.awt.*;
/*
	测试练习程序

*/
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); 
	//设置Panel的大小和位置
    p.setBounds(w/4,h/4,w/2,h/2);
    p.setBackground(Color.YELLOW);
    add(p);
    setVisible(true);
  }
}

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转载自mfcfine.iteye.com/blog/2391153