Java 中的 UUID 变体()方法，带示例

原文:https://www . geesforgeks . org/uuid-variant-method-in-Java-with-examples/

每个 UUID 都有一个不同的数字来描述这个 UUID 的产生。Java 中 UUID 类的变体()方法一般用来获取与这个 UUID 相关联的变体编号。

语法:

public int variant()

参数:该方法不取任何参数。

返回值:这个方法返回一个整数值，它是与这个 UUID 相关的变量数。

下面的程序说明了 variant()方法的工作原理:

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());
    }
}

Output:

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());
    }
}

Output:

UUID: 5fc03087-d265-11e7-b8c6-83e29cd24f4c
The variant number is: 2

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