Check if a given time lies between two times regardless of date

Question

I have timespans:

String time1 = 01:00:00

String time2 = 05:00:00

I want to check if time1 and time2 both lies between 20:11:13 and 14:49:00.

Actually, 01:00:00 is greater than 20:11:13 and less than 14:49:00 considering 20:11:13 is always less than 14:49:00. This is given prerequisite.

So what I want is, 20:11:13 < 01:00:00 < 14:49:00.

So I need something like that:

 public void getTimeSpans()
{
    boolean firstTime = false, secondTime = false;
    
    if(time1 > "20:11:13" && time1 < "14:49:00")
    {
       firstTime = true;
    }
    
    if(time2 > "20:11:13" && time2 < "14:49:00")
    {
       secondTime = true;
    }
 }

I know that this code does not give correct result as I am comparing the string objects.

How to do that as they are the timespans but not the strings to compare?

Answer 1

You can use the Calendar class in order to check.

For example:

try {
    String string1 = "20:11:13";
    Date time1 = new SimpleDateFormat("HH:mm:ss").parse(string1);
    Calendar calendar1 = Calendar.getInstance();
    calendar1.setTime(time1);
    calendar1.add(Calendar.DATE, 1);


    String string2 = "14:49:00";
    Date time2 = new SimpleDateFormat("HH:mm:ss").parse(string2);
    Calendar calendar2 = Calendar.getInstance();
    calendar2.setTime(time2);
    calendar2.add(Calendar.DATE, 1);

    String someRandomTime = "01:00:00";
    Date d = new SimpleDateFormat("HH:mm:ss").parse(someRandomTime);
    Calendar calendar3 = Calendar.getInstance();
    calendar3.setTime(d);
    calendar3.add(Calendar.DATE, 1);

    Date x = calendar3.getTime();
    if (x.after(calendar1.getTime()) && x.before(calendar2.getTime())) {
        //checkes whether the current time is between 14:49:00 and 20:11:13.
        System.out.println(true);
    }
} catch (ParseException e) {
    e.printStackTrace();
}