packageqingzh;importjava.applet.Applet;importjava.awt.Color;importjava.awt.Graphics;importjava.awt.Rectangle;publicclassTestextendsAppletimplementsRunnable{intx=150,y=50,r=30;//设置圆的属性intdx=11,dy=7;//圆的轨线设置Threadanimator;//线程volatilebooleanpleaseStop;//设置线程停止判断publicvoi