在编写小时钟程序中运用到了创建监听事件，以及实现其的接口方法。同时运用java中的AWT组件中创建用户接口、绘图和图像的类，画出时钟的窗体，以及绘制时针、擦除时针等。此外构造的方法和一些获得系统时间的函数，在窗体上显示时间从而实现时钟程序。-In the preparation of a small clock program used to create monitor events, as well as methods to achieve its interface. At the same time, the use of java in the AWT components to create user interfaces, graphics and images of the class, draw the clock form, as well as rendering the clock, the clock, such as Erase. In addition a number of construction methods and access to the system function of time, in the form shown on the time clock in order to achieve procedures.