说明：  Swing包括许多实用工具。其中计时器被Swing在内部使用。QdMw 　　当某些动作必须定时的被执行或在指定的时间被执行时，就要使用计时器。例如，动画可以使用计时器来更新动画的下一帧并控制移动动画对象和改变动画对象外观的速率。事实上，Swing本身使用计时器来进行自动滚动和显示工具提示。nmA
(Swing including many practical tools. Swing timer which was used in-house. QdMw when some irregular movements must be executed or at the designated time, was executed, we should use the timer. For example, animation timer can be used to update the next frame animation and control mobile animated objects and change the appearance of the object animation rate. In fact, Swing itself to the use of a timer for automatic rolling and display a tool tip. NmA)