这是一个用线程实现的图形动画实例，每当鼠标点击一次“Start”按钮，屏幕上将产生一个随机颜色的小圆球，该圆球将在屏幕上发生碰撞跳动，直到点击“Close”按钮为止。该实例由5个类构成，分别放在以下4个文件中：Ball.java、BallCanvas.java、BallThread.java、BounceFrame.java。主类是BounceFrame。-This is a thread with examples of the realization of a graphical animation, whenever the mouse to click a　Start　button, the screen will have a random color of the little round ball, the ball will be a collision on the screen beating until the click　Close　until button. The example posed by the five categories, namely on the following four documents: Ball.java, BallCanvas.java, BallThread.java, BounceFrame.java. The main category is BounceFrame.