Java UUID variant() Method

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Description

The Java UUID variant() method is used to return the variant number associated with this UUID. The variant number describes the layout of the UUID.

Declaration

Following is the declaration for java.util.UUID.variant() method.

public int variant()

Parameters

NA

Return Value

The method call returns the variant number of this UUID.

Exception

NA

Getting Variant Number of a UUID generated using Standard Formatted String Example

The following example shows the usage of Java UUID variant() method to get the variant number of this UUID. We've created a UUID object using a given string. Then we've printed the variant number of this UUID object using variant() method.

package com.tutorialspoint;

import java.util.UUID;

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

      // creating UUID      
      UUID x = UUID.fromString("38400000-8cf0-11bd-b23e-10b96e4ef00d");

      // getting variant number
      System.out.println("variant number: "+x.variant());    
   }    
}

Output

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

variant number: 2

Getting Variant Number of a Random UUID generated Example

The following example shows usage of Java UUID variant() method to get the variant number of this UUID. We've created a UUID object using randomUUID() method. Then we've printed the variant number of this UUID object using variant() method.

package com.tutorialspoint;

import java.util.UUID;

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

      // creating UUID      
      UUID x = UUID.randomUUID();

      // getting variant number
      System.out.println("variant number: "+x.variant());
   }    
}

Output

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

variant number: 2

Getting Variant Number of a UUID generated using Bytes Example

The following example shows usage of Java UUID variant() method to get the variant number of this UUID. We've created a UUID object using nameUUIDFromBytes() method. Then we've printed the variant number of this UUID object using variant() method.

package com.tutorialspoint;

import java.util.UUID;

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

      // creating byte array 
      byte[] nbyte = {10,20,30};

      // creating UUID from byte     
      UUID uid = UUID.nameUUIDFromBytes(nbyte);

      // getting variant number
      System.out.println("variant number: "+uid.variant());
   }    
}

Output

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

variant number: 2