Java UUID timestamp()用法及代码示例

Java中UUID类的timestamp()方法通常用于获取与特定UUID相关联的标记值。

用法:

public long timestamp()

参数：此方法不带任何参数。

返回值：此方法返回此UUID的时间戳记值。

异常：如果此UUID不是版本1 UUID的一部分，则此方法将引发UnsupportedOperationException。

以下示例程序旨在说明timestamp()方法的用法：

示例1:

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

输出：

UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66
The timestamp value is: 133118681719810007

示例2:

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

输出：

UUID: 5fc03087-d265-11e7-b8c6-83e29cd24f4c
The timestamp value is: 137309646498050183

相关用法

注：本文由纯净天空筛选整理自Chinmoy Lenka大神的英文原创作品 UUID timestamp() Method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。