Java UUID clockSequence()方法及示例

Java中UUID类的clockSequence()方法通常用于了解与此UUID相关的时钟序列值。该UUID的时钟序列字段被用来创建14位的时钟序列值。

语法

public int clockSequence()

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相关的时钟序列值。

异常： 如果这个UUID不是一个版本1的UUID，该方法会抛出UnsupportedOperationException。

以下程序说明了clockSequence()方法的工作。

程序1 :

// Java code to illustrate clockSequence() 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 clock sequence value
        System.out.println("The clock sequence value is: "
                           + UUID_1.clockSequence());
    }
}

输出:

UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66
The clock sequence value is: 5737

程序2

// Java code to illustrate clockSequence() 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 clock sequence value is: "
                           + UUID_1.clockSequence());
    }
}

输出:

UUID: 5fc03087-d265-11e7-b8c6-83e29cd24f4c
The clock sequence value is: 14534