UUID timestamp() Method in Java with Examples

The timestamp() method of UUID class in Java is generally used to get the stamp value associated with a particular UUID.

Syntax:

public long timestamp()

Parameters: This method does not take any parameter.

Return Value: This method returns the time stamp value of this UUID.

Exception: This method throws UnsupportedOperationException if this UUID is not a part of version 1 UUID.

Below programs illustrate the working of timestamp() method:

Program 1:

// Java code to illustrate timestamp() method

import java.util.*;

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

        // Creating two UUIDs
        UUID UUID_1
            = UUID
                  .fromString(
                      "58e0a7d7-eebc-11d8-9669-0800200c9a66");

        // Displaying the UUID
        System.out.println("UUID: "
                           + UUID_1);

        // Displaying the timestamp value
        System.out.println("The timestamp value is: "
                           + UUID_1.timestamp());
    }
}

Output:

UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66
The timestamp value is: 133118681719810007

Program 2:

// Java code to illustrate timestamp() 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");

        // Displaying the UUID
        System.out.println("UUID: "
                           + UUID_1);

        // Displaying the timestamp Value
        System.out.println("The timestamp value is: "
                           + UUID_1.timestamp());
    }
}

Output:

UUID: 5fc03087-d265-11e7-b8c6-83e29cd24f4c
The timestamp value is: 137309646498050183