java calendar计算时间差_Java Calendar 计算时间差
public static void main(String[] args) {
Calendar c=Calendar.getInstance();
int y=2016;//年
int M=1;//月
int d=1;//日
int H=0;//时
int m=0;//分
int s=0;//秒
c.set(Calendar.YEAR, y);
c.set(Calendar.MONTH, M-1);
c.set(Calendar.DATE, d);
c.set(Calendar.HOUR_OF_DAY, H);
c.set(Calendar.MINUTE, m);
c.set(Calendar.SECOND, s);
Calendar now=Calendar.getInstance();
long aTime=now.getTimeInMillis();
long bTime=c.getTimeInMillis();
long cTime=aTime-bTime;
long sTime=cTime/1000;//时间差，单位：秒
long mTime=sTime/60;
long hTime=mTime/60;
long dTime=hTime/24;
SimpleDateFormat f=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("当前时间："+f.format(now.getTime()));
System.out.println("设定时间："+f.format(c.getTime()));
System.out.println("时间差："+dTime+"天"+hTime%24+"时"+mTime%60+"分"+sTime%60+"秒");
}
public static void main(String[] args) { Calendar c=Calendar.getInstance(); int y=2016;//年 int M=1;//月 int d=1;//日 int H=0;//时 int m=0;//分 int s=0;//秒 c.set(Calendar.YEAR, y); c.set(Calendar.MONTH, M-1); c.set(Calendar.DATE, d); c.set(Calendar.HOUR_OF_DAY, H); c.set(Calendar.MINUTE, m); c.set(Calendar.SECOND, s); Calendar now=Calendar.getInstance(); long aTime=now.getTimeInMillis(); long bTime=c.getTimeInMillis(); long cTime=aTime-bTime; long sTime=cTime/1000;//时间差，单位：秒 long mTime=sTime/60; long hTime=mTime/60; long dTime=hTime/24; SimpleDateFormat f=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); System.out.println("当前时间："+f.format(now.getTime())); System.out.println("设定时间："+f.format(c.getTime())); System.out.println("时间差："+dTime+"天"+hTime%24+"时"+mTime%60+"分"+sTime%60+"秒"); }