Calendar.HOUR_OF_DAY与Calendar.HOUR不同

今天在做一个时间的时候，发现老是少12个小时。检查了好一会儿，才发现是Calendar.HOUR_OF_DAY与Calendar.HOUR导致的不同。

 

 

 String newStr = "1332391500000";
 Calendar cal = Calendar.getInstance();
 cal.setTimeInMillis(Long.parseLong(newStr));
 System.out.println(cal.getTime());
 System.out.println(cal.get(Calendar.YEAR) + "-"
         + format(cal.get(Calendar.MONTH) + 1, 2) + "-"
         + format(cal.get(Calendar.DATE), 2) + " "
         + format(cal.get(Calendar.HOUR_OF_DAY), 2) + ":"
         + format(cal.get(Calendar.MINUTE), 2) + ":"
         + format(cal.get(Calendar.SECOND), 2));

 

 

文档已经解释的很清楚了。

Calendar.HOUR_OF_DAY是：

Field number for get and set indicating the hour of the day. HOUR_OF_DAY is used for the 24-hour clock. E.g., at 10:04:15.250 PM the HOUR_OF_DAY is 22.

Calendar.HOUR是：

Field number for get and set indicating the hour of the morning or afternoon. HOUR is used for the 12-hour clock (0 - 11). Noon and midnight are represented by 0, not by 12. E.g., at 10:04:15.250 PM the HOUR is 10.