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-11d8-9669-0800200c9a66
The 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-b8c6-83e29cd24f4c
The variant number is: 2