Java UUID variant()方法及实例

每个UUID都有一个描述该UUID生成过程的变体号码。Java中UUID类的variant()方法通常用于获取与此UUID相关的变体号码。

语法

public int variant()

参数： 该方法不接受任何参数。

返回值： 该方法返回一个int值，即与该UUID相关的变体号码。

以下程序说明了variant()方法的工作。

程序1 :

// Java code to illustrate variant() 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 variant number        System.out.println("The variant number is: "                           + UUID_1.variant());    }}

输出:

UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66The variant number is: 2

程序2

// Java code to illustrate variant() 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 variant Value        System.out.println("The variant number is: "                           + UUID_1.variant());    }}

输出:

UUID: 5fc03087-d265-11e7-b8c6-83e29cd24f4cThe variant number is: 2