Find the duration of difference between two dates in Java

02 Jul, 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:
Create an object of SimpleDateFormat class and converts string format to date object.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.Find the time difference between two dates in millisecondes by using the method getTime() in Java as d2.getTime() – d1.getTime().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.Print the final result.
Create an object of SimpleDateFormat class and converts string format to date object.
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.
Find the time difference between two dates in millisecondes by using the method getTime() in Java as d2.getTime() – d1.getTime().
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.
Print the final result.
Below is the implementation of the above approach:
Java
// 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);    }}
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:
Java
// 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);    }}
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:
Java
// 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);    }}
Difference between two dates is: 2 years, 5 months and 0 days
Java-Date-Time
Java-LocalDate
Java-Period
Java-TimeUnit
Java Programs
Strings
Strings
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