app19_4.java

可以在一般背景下画图

// App19_4, 简单的applet程序
import java.awt.*; 
import java.applet.Applet; 

public class App19_4 extends Applet { 
   public void paint(Graphics g)
   {
       g.drawString("Hello Java!",30,50); 
       System.out.println("printed from Java console!");
   }
}