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UUID equals() Method in Java with Examples

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  • Last Updated : 27 Dec, 2018
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The equals() method of UUID class in Java is used to check for the equality of one UUID with another. The method returns True if both the UUID’s are exactly identical bit by bit.

Syntax:

public boolean equals(Object uuidObj)

Parameters: The method takes one parameter uuidObj to which the UUID_1 is to be compared.

Return Value: The method returns true if both the UUIDs are identical else false.

Below programs illustrate the working of equals() method:

Program 1:




// Java code to illustrate equals() 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");
  
        UUID UUID_2
            = UUID
                  .fromString(
                      "5fc03087-d265-11e7-b8c6-83e29cd24f4c");
  
        // Displaying the UUID values
        System.out.println("UUID_1: "
                           + UUID_1.clockSequence());
        System.out.println("UUID_2: "
                           + UUID_2.clockSequence());
  
        // Comparing both the UUIDs
        System.out.println("Are both UUID equal: "
                           + UUID_1.equals(UUID_2));
    }
}

Output:

UUID_1: 14534
UUID_2: 14534
Are both UUID equal: true

Program 2:




// Java code to illustrate equals() 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");
  
        UUID UUID_2
            = UUID
                  .fromString(
                      "58e0a7d7-eebc-11d8-9669-0800200c9a66");
  
        // Displaying the UUID values
        System.out.println("UUID_1: "
                           + UUID_1.clockSequence());
        System.out.println("UUID_2: "
                           + UUID_2.clockSequence());
  
        // Comparing both the UUIDs
        System.out.println("Are both UUID equal: "
                           + UUID_1.equals(UUID_2));
    }
}

Output:

UUID_1: 14534
UUID_2: 5737
Are both UUID equal: false

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