Java UUID compareTo() Method

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Description

The Java UUID compareTo(UUID val) method is used to compare this UUID with the specified UUID.

Declaration

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

public int compareTo(UUID val)

Parameters

val − This is the UUID to which this UUID is to be compared.

Return Value

The method call returns -1, 0 or 1 as this UUID is less than, equal to, or greater than val.

Exception

NA

Comparing two Same UUID generated Using Standard Formatted String Example

The following example shows usage of Java UUID compareTo() method to compare two UUIDs. We've created two same UUID object using fromString() method. Then we've compared the UUIDs using compareTo() method and result is printed.

package com.tutorialspoint;

import java.util.UUID;

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

      // creating UUIDs      
      UUID u1 = UUID.fromString("38400000-8cf0-11bd-b23e-10b96e4ef00d");
      UUID u2 = UUID.fromString("38400000-8cf0-11bd-b23e-10b96e4ef00d");

      // comparing uuids
      System.out.println("Comparing two UUIDs: "+u1.compareTo(u2));    
   }    
}

Output

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

Comparing two UUIDs: 0

Comparing two Different UUID generated Using Standard Formatted String Example

The following example shows usage of Java UUID compareTo() method to compare two UUIDs. We've created two different UUID object using fromString() method. Then we've compared the UUIDs using compareTo() method and result is printed.

package com.tutorialspoint;

import java.util.UUID;

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

      // creating UUIDs      
      UUID u1 = UUID.fromString("38400000-8cf0-11bd-b23e-10b96e4ef11d");
      UUID u2 = UUID.fromString("38400000-8cf0-11bd-b23e-10b96e4ef00d");

      // comparing uuids
      System.out.println("Comparing two UUIDs: "+u1.compareTo(u2));    
   }    
}

Output

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

Comparing two UUIDs: 1

Comparing two Different UUID generated Using Standard Formatted String Example

The following example shows usage of Java UUID compareTo() method to compare two UUIDs. We've created two different UUID object using fromString() method. Then we've compared the UUIDs using compareTo() method and result is printed.

package com.tutorialspoint;

import java.util.UUID;

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

      // creating UUIDs      
      UUID u1 = UUID.fromString("38400000-8cf0-11bd-b23e-10b96e4ef00d");
      UUID u2 = UUID.fromString("38400000-8cf0-11bd-b23e-10b96e4ef11d");

      // comparing uuids
      System.out.println("Comparing two UUIDs: "+u1.compareTo(u2));    
   }    
}

Output

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

Comparing two UUIDs: -1