Date hashCode() method in Java with Examples

The hashCode() method of Java Date class returns a value which is a hash code for this object.

Syntax:

public int hashCode()

Parameters: The function does not accept any parameter.

Return Value: It returns a hashCode value for this object.

Exception: The function does not throws any exception.

Program below demonstrates the above mentioned function:

// Java code to demonstrate
// hashCode() function of Date class

import java.util.Date;
import java.util.Calendar;
public class GfG {
    // main method
    public static void main(String[] args)
    {

        // creating a Calendar object
        Calendar c1 = Calendar.getInstance();

        // set Month
        // MONTH starts with 0 i.e. ( 0 - Jan)
        c1.set(Calendar.MONTH, 11);

        // set Date
        c1.set(Calendar.DATE, 05);

        // set Year
        c1.set(Calendar.YEAR, 1996);

        // creating a date object with specified time.
        Date dateOne = c1.getTime();

        System.out.println("Date: " + dateOne);

        // Prints hash Code
        System.out.println("HashCode: "
                           + dateOne.hashCode());
    }
}

Output:

Date: Thu Dec 05 08:22:04 UTC 1996
HashCode: -629399711

// Java code to demonstrate
// hashCode() function of Date class

import java.util.Date;
import java.util.Calendar;
public class GfG {
    // main method
    public static void main(String[] args)
    {

        // creating a Calendar object
        Calendar c1 = Calendar.getInstance();

        // set Month
        // MONTH starts with 0 i.e. ( 0 - Jan)
        c1.set(Calendar.MONTH, 11);

        // set Date
        c1.set(Calendar.DATE, 21);

        // set Year
        c1.set(Calendar.YEAR, 1999);

        // creating a date object with specified time.
        Date dateOne = c1.getTime();

        System.out.println("Date: " + dateOne);

        // Prints hash Code
        System.out.println("HashCode: "
                           + dateOne.hashCode());
    }
}

Output:

Date: Tue Dec 21 08:22:09 UTC 1999
HashCode: 871724355