Java: Compute the difference between two dates (Hours, minutes, milli, seconds and nano)

Last update on May 19 2025 13:12:03 (UTC/GMT +8 hours)

31. Date Difference (Time Units)

Write a Java program to compute the difference between two dates in hours, minutes, milliseconds, and nanoseconds.

Sample Solution:

Java Code:

import java.time.*;
import java.util.*;

public class Exercise31 {  
   public static void main(String[] args)
    {
     LocalDateTime dateTime = LocalDateTime.of(2016, 9, 16, 0, 0);
     LocalDateTime dateTime2 = LocalDateTime.now();
     int diffInNano = java.time.Duration.between(dateTime, dateTime2).getNano();
     long diffInSeconds = java.time.Duration.between(dateTime, dateTime2).getSeconds();
     long diffInMilli = java.time.Duration.between(dateTime, dateTime2).toMillis();
     long diffInMinutes = java.time.Duration.between(dateTime, dateTime2).toMinutes();
     long diffInHours = java.time.Duration.between(dateTime, dateTime2).toHours();
     System.out.printf("\nDifference is %d Hours, %d Minutes, %d Milli, %d Seconds and %d Nano\n\n", 
                   diffInHours, diffInMinutes, diffInMilli, diffInSeconds, diffInNano );

  }
}

Sample Output:

Difference is 6686 Hours, 401180 Minutes, 24070844780 Milli, 24070844 Seconds and 780000000 Nano

N.B.: The result may varry for your system date and time.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to calculate the difference between two dates in hours, minutes, milliseconds, and nanoseconds.
• Write a Java program to compute the total elapsed time between two date-time values down to the nanosecond.
• Write a Java program to determine the duration between two timestamps and display the result in multiple time units.
• Write a Java program to compare two date-time values and output the difference in a detailed time breakdown.

Go to:

• Java Date and Time Exercises Home ↩
• Java Exercises Home ↩

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