SimpleDateFormat 上的 java HH:mm 和 hh:mm 之间的区别

Whats the difference between kk:mm, HH:mm and hh:mm formats ??

    SimpleDateFormat broken = new SimpleDateFormat("kk:mm:ss");
    broken.setTimeZone(TimeZone.getTimeZone("Etc/UTC"));
    SimpleDateFormat working = new SimpleDateFormat("HH:mm:ss");
    working.setTimeZone(TimeZone.getTimeZone("Etc/UTC"));
    SimpleDateFormat working2 = new SimpleDateFormat("hh:mm:ss");
    working.setTimeZone(TimeZone.getTimeZone("Etc/UTC"));

    System.out.println(broken.format(epoch));
    System.out.println(working.format(epoch));
    System.out.println(working2.format(epoch));

打印:

24:00:00
00:00:00
05:30:00

推荐答案

kk: (01-24) 看起来像 01, 02..24.