interface USB {voidopen();// 开启功能voidclose();// 关闭功能}
定义鼠标类:
classMouseimplements USB {publicvoidopen(){System.out.println("鼠标开启,红灯闪一闪");}publicvoidclose(){System.out.println("鼠标关闭,红灯熄灭");}publicvoidclick(){System.out.println("鼠标单击");}}
定义键盘类:
classKeyBoardimplements USB {publicvoidopen(){System.out.println("键盘开启,绿灯闪一闪");}publicvoidclose(){System.out.println("键盘关闭,绿灯熄灭");}publicvoidtype(){System.out.println("键盘打字");}}