public static void main(String[] args) { System.out.println(fun(3.1415926,3)); } }
long fun(Date one, Date two) { long m = one.getTime()>two.getTime()?one.getTime()-two.getTime():two.getTime()-one.getTime(); System.out.println(m); long d = m/86400000; long x = m%86400000; return d; }
改造一下:long fun(Date one, Date two) { long m = one.getTime()>two.getTime()?one.getTime()-two.getTime():two.getTime()-one.getTime(); System.out.println(m); long d = m/(24l * 60 * 60 * 1000); long x = m%(24l * 60 * 60 * 1000); if (x != 0) d ++; return d; }
{ public static double fun(double d, int n)
{
for(int i=0; i<n;i++)
d*=10;
d = Math.round(d);
for(int i=0;i<n;i++)
d/=10;
return d;
}
public static void main(String[] args)
{
System.out.println(fun(3.1415926,3));
}
}
{
long m = one.getTime()>two.getTime()?one.getTime()-two.getTime():two.getTime()-one.getTime();
System.out.println(m);
long d = m/86400000;
long x = m%86400000;
return d;
}
{
long m = one.getTime()>two.getTime()?one.getTime()-two.getTime():two.getTime()-one.getTime();
System.out.println(m);
long d = m/(24l * 60 * 60 * 1000);
long x = m%(24l * 60 * 60 * 1000);
if (x != 0) d ++;
return d;
}
返回自 1970 年 1 月 1 日 00:00:00 GMT 以来此 Date 对象表示的毫秒数,
(date1.getTime()-date2.getTime())/(24*60*60*1000)小数如何取整lz自己看着办。
1970 年 1 月 1以前的不知怎么办。
NumberFormat nf=NumberFormat.getInstance();
nf.setMaximumFractionDigits(n);
nf.setMinimumFractionDigits(n);
return nf.format(num);
}
2. public long dateDivide(Date begin,Date end){
long begintime=begin.getTime();
long endtime=end.getTime();
long value=endtime-begintime;
if(value%(1000*60*60*24)==0)
return value/(1000*60*60*24);
else
return (value/(1000*60*60*24))+1;
}
返回的是1天还是0天呢?没理解错的话,应该是0天吧我觉得应该把两个目标对象整理到"天",再比较,代码如下:
public long checkDate(Date d1, Date d2){
long d1Fix = d1.getTime() / (1000 * 60 * 60 * 24L);
long d2Fix = d2.getTime() / (1000 * 60 * 60 * 24L);
return ( d1Fix > d2Fix ? d1Fix - d2Fix : d2Fix - d1Fix);
}
String temp="###0.";
for (int i=0;i<scale ;i++ ){
temp+="0";
}
return Double.valueOf(new java.text.DecimalFormat(temp).format(v));
}
从高手那看到了这个方法~~~~