example4_5.java

书中的例题

/* 面板Panel简单示例 */
import java.awt.*;
public class Example4_5 extends java.applet.Applet
{  Panel panel1,panel2;
   Button button1,button2,button3,button4;
   public void init()
     {  
		 panel1=new Panel(); 
		 panel2=new Panel();
         add(panel1); add(panel2);

         button1=new Button("Button1");
         button2=new Button("Button2");
         button3=new Button("Button3");
         button4=new Button("Button4");
	     panel1.add(button1);  panel1.add(button2);
         panel2.add(button3);  panel2.add(button4);
		 panel1.setBackground(Color.red);
		 panel2.setBackground(Color.cyan);		 
	}
 }