Java UUID getMostSignificantBits()用法及代碼示例

UUID是128位值。 Java中UUID類的getMostSignificantBits()方法用於獲取此UUID的最高有效64位。

用法:

public long getMostSignificantBits()

參數：該方法不帶任何參數。

返回值：該方法返回一個整數值，該值是此128個值的UUID的最高有效64位。

以下示例程序旨在說明getMostSignificantBits()方法的用法：

示例1:

// Java code to illustrate 
// getMostSignificantBits() 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 value of UUID 
        System.out.println("The value is: "
                           + UUID_1.clockSequence()); 
  
        // Getting the most significant 64 bit 
        System.out.println("The most significant 64 bit: "
                           + UUID_1 
                                 .getMostSignificantBits()); 
    } 
}

輸出：

UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66
The value is: 5737
The most significant 64 bit: 6404303215985955288

示例2:

// Java code to illustrate 
// getMostSignificantBits() 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 value of UUID 
        System.out.println("The value is: "
                           + UUID_1.clockSequence()); 
  
        // Getting the most significant 64 bit 
        System.out.println("The most significant 64 bit: "
                           + UUID_1.getMostSignificantBits()); 
    } 
}

輸出：

UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66
The value is: 5737
The most significant 64 bit: 6404303215985955288

相關用法

注：本文由純淨天空篩選整理自Chinmoy Lenka大神的英文原創作品 UUID getMostSignificantBits() Method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。