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I have two timings with hh:mm:ss format in string.How to compare two strings.

What I have tried:

Java


Time comparation in java these are in string?
Posted
Updated 13-Feb-17 10:13am
Comments
[no name] 13-Feb-17 12:37pm    
You don't. You compare date times, not strings.

Try this and adapt:
import java.util.*;
import java.lang.*;
import java.text.ParseException;
import java.util.Date;
import java.text.SimpleDateFormat;

class Rextester
{  
    public static void main(String args[])
    {
        String startTime = "10:15:20 am";
        String endTime = "12:30:37 pm";

        SimpleDateFormat sdf = new SimpleDateFormat("hh:mm:ss a");
        try {
            
            Date d1 = sdf.parse(startTime);
            
            Date d2 = sdf.parse(endTime);
  
            long elapsed = d2.getTime() - d1.getTime(); 
            
            int hours = (int) Math.floor(elapsed / 3600000);
            
            int minutes = (int) Math.floor((elapsed - hours * 3600000) / 60000);
            
            int seconds = (int) Math.floor((elapsed - hours * 3600000 - minutes * 60000) / 1000);
            
            System.out.format("From %s to %s%n", startTime, endTime);
                                    
            System.out.format("Time elapsed %d milliseconds%n", elapsed);
            
            System.out.format("%d hours %d minutes %d seconds%n", hours, minutes, seconds);


         } catch (ParseException e) {
              e.printStackTrace();
         }
    }
}
or view Demo[^]
reference: SimpleDateFormat : Date Format « Data Type « Java Tutorial[^]
 
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v2
With all the details you didn't gave us, about any answer is right.
Quote:
hh:mm:ss

This time format is the 24 hours time format as used in Europa, also known as military time format in USA.
If the goal is to compare like < = >, direct string comparison do the trick.
If the goal is to get the time difference, a conversion to time datatype is necessary.
 
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