Java UUID hashCode() Method

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Description

The Java UUID hashCode() method is used to return a hash code for this UUID.

Declaration

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

public int hashCode()

Parameters

NA

Return Value

The method call returns a hash code value for this UUID.

Exception

NA

Getting HashCode of a UUID generated using Standard Formatted String Example

The following example shows the usage of Java UUID hashCode() method to get the hash code of this UUID. We've created a UUID object using a given string. Then we've printed the hash code of this UUID object using hashCode() 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 hash code
      System.out.println("hash code: "+x.hashCode());    
   }    
}

Output

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

hash code: 1757475081

Getting HashCode of a Random UUID generated Example

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

package com.tutorialspoint;

import java.util.UUID;

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

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

      // getting hash code
      System.out.println("hash code: "+x.hashCode());
   }    
}

Output

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

hash code: 1822242641

Getting HashCode of a UUID generated using Bytes Example

The following example shows usage of Java UUID hashCode() method to get the hash code of this UUID. We've created a UUID object using nameUUIDFromBytes() method. Then we've printed the hash code of this UUID object using hashCode() 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 hash code
      System.out.println("hash code: "+uid.hashCode());
   }    
}

Output

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

hash code: -1008968254