Java Data Type How to - Comparing two Time in Strings

Question

We would like to know how to comparing two Time in Strings.

Answer

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.TimeUnit;
/* w w  w.  j  a va2s.c  o  m*/
public class Main {
  public static void main(String[] args) throws java.lang.Exception {
    String[] StartTimes = { "10:00", "7:00" };
    String[] EndTimes = { "12:00", "14:56" };
    for (int i = 0; i < StartTimes.length; i++) {
      if (StartTimes != null && StartTimes.length > 0 && EndTimes != null
          && EndTimes.length > 0) {
        SimpleDateFormat format = new SimpleDateFormat("HH:mm");
        Date date1 = format.parse(StartTimes[i]);
        Date date2 = format.parse(EndTimes[i]);
        long millis = date2.getTime() - date1.getTime();

        String hourminute = String.format(
            "%02d:%02d",
            TimeUnit.MILLISECONDS.toHours(millis),
            TimeUnit.MILLISECONDS.toMinutes(millis)
                - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS
                    .toHours(millis)));
        System.out.println(hourminute);
      }
    }
  }
}