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дÁ˸ö¼òµ¥µÄ²âÊÔ´úÂ룬²âÊÔÁËJAVAµÄʱ¼ä¸üе¥Ôª£¬·¢ÏÖcurrentTimeMillisµÄ¸üÐÂÖÜÆÚ´óÔ¼ÊÇ15»ò16ms£¬ËùÒÔ¾«¶ÈÒ²¾ÍÔÚ15ms-16ms,µÍÓÚ15msµÄʱ¼äÊÇÎÞ·¨²âÁ¿³öÀ´µÄ¡£¶ønanoTimeµÄ¸üÐÂÖÜÆÚ´óÔ¼ÔÚ800-1200ÄÉÃë×óÓÒ£¬Òò´ËµÍÓÚ 800nsµÄʱ¼äÎÞ·¨²âÁ¿³öÀ´¡£´úÂëÈçÏ£º
public class JavaTimeWinTest
{
public static void main(String[] args)
{
msTest();
nsTest();
}
private static void msTest()
{
int size = 6000000;
long[] times = new long[size];
for(int k = 0 ;k <size;k++)
{
times[k] = System.currentTimeMillis();
}
long preTime = times[0] ;
for(int k = 1 ;k <size;k++)
{
if(times[k]>preTime)
{
System.out.print("ms µ±Ç°Öµ:" + times[k]);
System.out.println(" ±ä»¯Öµ:" + (times[k]-preTime));
preTime = times[k];
}
}
}
private static void nsTest()
{
int size = 50;
long[] times = new long[size];
for(int k = 0 ;k <size;k++)
{
times[k] = System.nanoTime();
}
long preTime = times[0] ;
for(int k = 1 ;k <size;k++)
{
if(times[k]>preTime)
{
System.out.print("ns µ±Ç°Öµ:" + times[k]);
System.out.println(" ±ä»¯Öµ:" + (times[k]-preTime));
preTime = times[k];
}
}
}
}
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ms µ±Ç°Öµ:1262223891000 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891015 ±ä»¯Öµ:15
ms µ±Ç°Öµ:1262223891031 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891046 ±ä»¯Öµ:15
ms µ±Ç°Öµ:1262223891062 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891078 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891093 ±ä»¯Öµ:15
ms µ±Ç°Öµ:1262223891109 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891125 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891140 ±ä»¯Öµ:15
ms µ±Ç°Öµ:1262223891156 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891171 ±ä»¯Öµ:15
ms µ±Ç°Öµ:1262223891187 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891203 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891218 ±ä»¯Öµ:15
ms µ±Ç°Öµ:1262223891234 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891250 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891265 ±ä»¯Öµ:15
ms µ±Ç°Öµ:1262223891281 ±ä»¯Öµ:16
ms µ±Ç°Öµ:1262223891296 ±ä»¯Öµ:15
ns µ±Ç°
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