Java UUID randomUUID() Method

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Description

The Java UUID randomUUID() method is used to retrieve a type 4 (pseudo randomly generated) UUID. The UUID is generated using a cryptographically strong pseudo random number generator.

Declaration

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

public static UUID randomUUID()

Parameters

NA

Return Value

The method call returns a randomly generated UUID.

Exception

NA

Getting a Randomly generated UUID Example

The following example shows usage of Java UUID randomUUID() method to get a type 3 (name based) UUID based on the specified byte array. We've created a UUID object using randomUUID() method. Then we've printed the UUID.

package com.tutorialspoint;

import java.util.UUID;

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

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

      // checking the value of random UUID
      System.out.println("Random UUID value: "+uid);    
   }    
}

Output

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

Random UUID value: f97dde36-9fa2-4f7c-8c3d-93efb61fbc79