Java GregorianCalendar hashCode() Method

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Description

The Java GregorianCalendar hashCode() method generates the hash code for this GregorianCalendar object.

Declaration

Following is the declaration for java.util.GregorianCalendar.hashCode() method

public int hashCode()

Parameters

NA

Return Value

This method returns a hash code value for this object.

Exception

NA

Getting HashCode for a Current Dated GregorianCalendar Instance Example

The following example shows the usage of Java GregorianCalendar hashCode() method. We're creating a GregorianCalendar instance of current date. We're printing the hash of the calendar using hashCode() method.

package com.tutorialspoint;

import java.util.GregorianCalendar;

public class GregorianCalendarDemo {
   public static void main(String[] args) {

      // create a new calendar
      GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();

      // print the current date and time
      System.out.println("" + cal.getTime());

      // get hashcode
      System.out.println(cal.hashCode());
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Mon Apr 29 14:33:31 IST 2024
-546448161

Getting HashCode for a Future Dated GregorianCalendar Instance Example

The following example shows the usage of Java GregorianCalendar hashCode() method. We're creating a GregorianCalendar instance of current date. Then we've added two years to the calendar and printing the hash of the calendar using hashCode() method.

package com.tutorialspoint;

import java.util.GregorianCalendar;

public class GregorianCalendarDemo {
   public static void main(String[] args) {

      // create a new calendar
      GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();

      // print the current date and time
      System.out.println("" + cal.getTime());
	  
      // add two years
	  cal.add(GregorianCalendar.YEAR, 2);

      // get hashcode
      System.out.println(cal.hashCode());
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Mon Apr 29 14:33:50 IST 2024
772767361

Getting HashCode for a Past Dated GregorianCalendar Instance Example

The following example shows the usage of Java GregorianCalendar hashCode() method. We're creating a GregorianCalendar instance of current date. Then we've subtracted two years from the calendar and printing the hash of the calendar using hashCode() method.

package com.tutorialspoint;

import java.util.GregorianCalendar;

public class GregorianCalendarDemo {
   public static void main(String[] args) {

      // create a new calendar
      GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();

      // print the current date and time
      System.out.println("" + cal.getTime());
	  
      // subtract two years
	  cal.add(GregorianCalendar.YEAR, -2);

      // get hashcode
      System.out.println(cal.hashCode());
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Mon Apr 29 14:34:08 IST 2024
-2098873529