Java实现当前时间的打印与时间的前推和后移

最新推荐文章于 2024-07-14 03:30:56 发布

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最新推荐文章于 2024-07-14 03:30:56 发布

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本文链接：https://blog.youkuaiyun.com/weixin_44770633/article/details/97283323

本文详细介绍了一个自定义的Java时间类，该类用于封装时间并提供如时间增减、计算时间差等实用功能。文章深入解析了类的构造方法、时间调整方法以及时间差计算的实现原理。

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import java.util.Calendar;

public class Time{
   private int hour;
   private int minutes;
   private int second;


   public Time(int hour,int minutes, int second)
   {
       if(hour<0 || hour>23)
       {
           System.err.println("超出");
           return;
       }
       if(minutes<0 || minutes>59)
       {
           System.err.println("超出");
           return;
       }
       if(second<0 || second>59)
       {
           System.err.println("超出");
           return;
       }

       //属性的初始化
       this.hour = hour;
       this.minutes = minutes;
       this.second = second;
   }

   public Time after(int seconds)
   {
       second+=seconds;
       while(second>59)
       {
           second-=60;
           minutes+=1;
       }
       if(minutes>59)
       {
           minutes=0;
           hour+=1;
       }
       if(hour>23)
       {
           hour=0;
       }
       return this;
   }
   //重载
   //public Time after(int minutes, int seconds)

   //public Time after(int hour, int minutes, int seconds)

   public Time before(int seconds)
   {

       second=seconds-second;
       while(second>59)
       {
           second-=60;
           minutes-=1;
           if(minutes<0)
       {
           minutes=59;
           hour-=1;
       }
       if(hour<0)
       {
           hour=23;
       }
       }

       return this;
   }

   //相差多少秒
   public static int diff(Time a,Time b){
       int se = 0;
       Calendar time1 = Calendar.getInstance();
       time1.set(0,0,0,a.hour,a.minutes,a.second);
       System.out.println(time1.getTime());
       long mis1 = (long)time1.getTime().getTime();

       Calendar time2 = Calendar.getInstance();
       time2.set(0,0,0,b.hour,b.minutes,b.second);
       System.out.println(time2.getTime());
       long mis2 = (long)time2.getTime().getTime();

       if(mis1>mis2)
       {
           System.out.println("相差的秒数为:"+(mis1-mis2)/1000);//mis为毫秒
           se = (int)(mis1-mis2)/1000;
       }
       else if(mis1==mis2)
       {
           System.out.println("同一秒");
           se = 0;
       }
       else
       {
           System.out.println("相差的秒数为:"+(mis2-mis1)/1000);
           se = (int)(mis2-mis1)/1000;
       }
       return se;
   }

   public String toString(){
       return String.format("%02d：%02d：%02d",hour,minutes,second);
   }

   public static void main(String[] args)
   {
       Time now1 = new Time(00,00,00);
       Time now2 = new Time(01,01,30);
       int se = diff(now1,now2);
       System.out.println(se);
       //Time d = new Time(0,0,0);
       //Time r = d.after(3601);
       //Time s = d.before(3600);
       //System.out.println(r.toString());
       //System.out.println(s.toString());
   }
}