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Find the duration of difference between two dates in Java - GeeksforGeeks

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Find the duration of difference between two dates in Java

Last Updated: 02-07-2020

Given two dates start_date and end_date with time in the form of strings, the task is to find the difference between two dates in Java.

Examples:

Input: start_date = “10-01-2018 01:10:20”, end_date = “10-06-2020 06:30:50”
Output: 2 years, 152 days, 5 hours, 20 minutes, 30 seconds

Input: start_date = “10-01-2019 01:00:00”, end_date = “10-06-2020 06:00:00”
Output: 1 years, 152 days, 5 hours, 0 minutes, 0 seconds

Method 1: Use SimpleDateFormat and Date class to find the difference between two dates. Below are the steps:

  1. Create an object of SimpleDateFormat class and converts string format to date object.
  2. Parse both start_date and end_date from a string to produce the date, this can be done by using parse() method of the simpleDateFormat class.
  3. Find the time difference between two dates in millisecondes by using the method getTime() in Java as d2.getTime() – d1.getTime().
  4. Use date-time mathematical formula to find the difference between two dates. It returns the years, days, hours, minutes, and seconds between the two specifies dates.
  5. Print the final result.

Below is the implementation of the above approach:

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// Java program for the above approach
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
class GFG {
// Function to print difference in
// time start_date and end_date
static void
findDifference(String start_date,
String end_date)
{
// SimpleDateFormat converts the
// string format to date object
SimpleDateFormat sdf
= new SimpleDateFormat(
"dd-MM-yyyy HH:mm:ss");
// Try Block
try {
// parse method is used to parse
// the text from a string to
// produce the date
Date d1 = sdf.parse(start_date);
Date d2 = sdf.parse(end_date);
// Calucalte time difference
// in milliseconds
long difference_In_Time
= d2.getTime() - d1.getTime();
// Calucalte time difference in
// seconds, minutes, hours, years,
// and days
long difference_In_Seconds
= (difference_In_Time
/ 1000)
% 60;
long difference_In_Minutes
= (difference_In_Time
/ (1000 * 60))
% 60;
long difference_In_Hours
= (difference_In_Time
/ (1000 * 60 * 60))
% 24;
long difference_In_Years
= (difference_In_Time
/ (1000l * 60 * 60 * 24 * 365));
long difference_In_Days
= (difference_In_Time
/ (1000 * 60 * 60 * 24))
% 365;
// Print the date difference in
// years, in days, in hours, in
// minutes, and in seconds
System.out.print(
"Difference "
+ "between two dates is: ");
System.out.println(
difference_In_Years
+ " years, "
+ difference_In_Days
+ " days, "
+ difference_In_Hours
+ " hours, "
+ difference_In_Minutes
+ " minutes, "
+ difference_In_Seconds
+ " seconds");
}
// Catch the Exception
catch (ParseException e) {
e.printStackTrace();
}
}
// Driver Code
public static void main(String[] args)
{
// Given start Date
String start_date
= "10-01-2018 01:10:20";
// Given end Date
String end_date
= "10-06-2020 06:30:50";
// Function Call
findDifference(start_date, end_date);
}
}
Output:

Difference between two dates is: 2 years, 152 days, 5 hours, 20 minutes, 30 seconds

Method 2: We can find the difference between two dates in a better way by using Java built-in class TimeUnit.

Below is the implementation of the above approach:

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// Java program to find the
// difference between two dates
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.concurrent.TimeUnit;
import java.util.Date;
class GFG {
// Function to print difference in
// time start_date and end_date
static void findDifference(String start_date,
String end_date)
{
// SimpleDateFormat converts the
// string format to date object
SimpleDateFormat sdf
= new SimpleDateFormat(
"dd-MM-yyyy HH:mm:ss");
// Try Class
try {
// parse method is used to parse
// the text from a string to
// produce the date
Date d1 = sdf.parse(start_date);
Date d2 = sdf.parse(end_date);
// Calucalte time difference
// in milliseconds
long difference_In_Time
= d2.getTime() - d1.getTime();
// Calucalte time difference in seconds,
// minutes, hours, years, and days
long difference_In_Seconds
= TimeUnit.MILLISECONDS
.toSeconds(difference_In_Time)
% 60;
long difference_In_Minutes
= TimeUnit
.MILLISECONDS
.toMinutes(difference_In_Time)
% 60;
long difference_In_Hours
= TimeUnit
.MILLISECONDS
.toHours(difference_In_Time)
% 24;
long difference_In_Days
= TimeUnit
.MILLISECONDS
.toDays(difference_In_Time)
% 365;
long difference_In_Years
= TimeUnit
.MILLISECONDS
.toDays(difference_In_Time)
/ 365l;
// Print the date difference in
// years, in days, in hours, in
// minutes, and in seconds
System.out.print(
"Difference"
+ " between two dates is: ");
// Print result
System.out.println(
difference_In_Years
+ " years, "
+ difference_In_Days
+ " days, "
+ difference_In_Hours
+ " hours, "
+ difference_In_Minutes
+ " minutes, "
+ difference_In_Seconds
+ " seconds");
}
catch (ParseException e) {
e.printStackTrace();
}
}
// Driver Code
public static void main(String[] args)
{
// Given start_date
String start_date
= "10-01-2018 01:10:20";
// Given end_date
String end_date
= "10-06-2020 06:30:50";
// Function Call
findDifference(start_date,
end_date);
}
}
Output:

Difference between two dates is: 2 years, 152 days, 5 hours, 20 minutes, 30 seconds

Method 3: Use Period class in Java to find the difference between two days. The Period.between() method is used to calculate the difference between two dates in years, months, and days.

Below is the implementation of the above approach:

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// Java program for the above approach
import java.time.*;
import java.util.*;
class GFG {
// Function to print difference in
// time start_date and end_date
static void
findDifference(LocalDate start_date,
LocalDate end_date)
{
// find the period between
// the start and end date
Period diff
= Period
.between(start_date,
end_date);
// Print the date difference
// in years, months, and days
System.out.print(
"Difference "
+ "between two dates is: ");
// Print the result
System.out.printf(
"%d years, %d months"
+ " and %d days ",
diff.getYears(),
diff.getMonths(),
diff.getDays());
}
// Driver Code
public static void main(String[] args)
{
// Start date
LocalDate start_date
= LocalDate.of(2018, 01, 10);
// End date
LocalDate end_date
= LocalDate.of(2020, 06, 10);
// Function Call
findDifference(start_date,
end_date);
}
}
Output:

Difference between two dates is: 2 years, 5 months and 0 days

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