模拟时钟运行
一个clock类里面有两个display类，分别是时针分针，通过clock实现两个时针(对象)，分针(对象）的交互.
两个对象互相不相关,通过比它们更高级的clock来实现交互
一个clock工程里面一个clock包，里边两个类，一个display类，一个clock类.
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package clock; public class display { private int value = 0; private int limit = 0; public display(int limit) { this.limit=limit; } public void increase() { value++; if(value == limit) { value = 0; } } public int getValue() { return value; } public static void main(String[] args) { display d = new display(24); for(;;) { d.increase(); System.out.println(d.getValue()); } } }
package clock; public class clock { private display hour = new display(24); private display minute = new display(60); public void start() { while(true) { minute.increase(); if(minute.getValue() == 0) { hour.increase(); } System.out.printf("%02d:%02d\n",hour.getValue(),minute.getValue()); } } public static void main(String[] args) { clock clock = new clock(); clock.start(); } }
原文：https://blog.csdn.net/weixin_41183791/article/details/82818115