Java中的 UUID clockSequence() 方法及示例
Java中UUID类的clockSequence()方法一般用来知道这个UUID关联的时钟序列值。此 UUID 的时钟序列字段用于创建 14 位时钟序列值。
句法:
public int clockSequence()
参数:此方法不带任何参数。
返回值:此方法返回一个int 值,该值是与此 UUID 关联的时钟序列值。
异常:如果此 UUID 不是版本 1 UUID,该方法将引发UnsupportedOperationException 。
下面的程序说明了 clockSequence() 方法的工作:
方案一:
// 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
方案二:
// 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