UUID hashCode() Method in Java with Examples

The hashCode() method of UUID class in Java is generally used to get the hash code value of the UUID.

Syntax:

public int hashCode()

Parameters: This method does not take any parameter.

Return Value: This method returns an integer value which is the hashCode value for this UUID instance.

Below programs illustrate the working of hashCode() method:

Program 1:

// Java code to illustrate hashCode() method

import java.util.*;

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

        // Creating two UUIDs
        UUID UUID_1
            = UUID
                  .fromString(
                      "58e0a7d7-eebc-11d8-9669-0800200c9a66");

        // Displaying the UUID
        System.out.println("UUID: "
                           + UUID_1);

        // Displaying the hashCode value
        System.out.println("The hashCode value is: "
                           + UUID_1.hashCode());
    }
}

Output:

UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66
The hashCode value is: 3744873

Program 2:

// Java code to illustrate hashCode() method

import java.util.*;

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

        // Creating two UUIDs
        UUID UUID_1
            = UUID
                  .fromString(
                      "5fc03087-d265-11e7-b8c6-83e29cd24f4c");

        // Displaying the UUID
        System.out.println("UUID: "
                           + UUID_1);

        // Displaying the hashCode Value
        System.out.println("The hashCode value is: "
                           + UUID_1.hashCode());
    }
}

Output:

UUID: 5fc03087-d265-11e7-b8c6-83e29cd24f4c
The hashCode value is: -1447957042