Java UUID nameUIDFromBytes()方法及示例

Java中UUID类的nameUIDFromBytes()方法通常用于根据指定的字节数组检索一个基于第三类名称的UUID。这被用作静态工厂方法。

语法

public static UUID nameUUIDFromBytes(byte[] byte_name)

参数： 该方法接受一个参数byte_name，它指的是用来构建UUID的字节数组。

返回值： 该方法返回一个由指定数组生成的UUID实例。

下面的程序说明了nameUIDFromBytes()方法的工作。

程序1 :

// Java code to illustrate nameUUIDFromBytes() method
  
import java.util.*;
  
public class UUID_Demo {
    public static void main(String[] args)
    {
  
        // Creating a byte array
        byte[] byte_name
            = { 50, 40, 30, 20, 10 };
  
        // Printing the byte[]
        System.out.println("Specified byte array: "
                           + Arrays.toString(byte_name));
  
        // Creating an UUID from byte
        UUID UU_ID
            = UUID
                  .nameUUIDFromBytes(byte_name);
  
        // Displaying the UUID value
        System.out.println("UUID value from byte: "
                           + UU_ID);
    }
}

输出:

Specified byte array: [50, 40, 30, 20, 10]
UUID value from byte: d66541c4-a9db-3308-8c67-bbf87dc0df8b

程序2

// Java code to illustrate nameUUIDFromBytes() method
  
import java.util.*;
  
public class UUID_Demo {
    public static void main(String[] args)
    {
  
        // Creating a byte array
        byte[] byte_name
            = { 10, 15, 1, 45, 13, 20, 71 };
  
        // Printing the byte[]
        System.out.println("Specified byte array: "
                           + Arrays.toString(byte_name));
  
        // Creating an UUID from byte
        UUID UU_ID
            = UUID
                  .nameUUIDFromBytes(byte_name);
  
        // Displaying the UUID value
        System.out.println("UUID value from byte: "
                           + UU_ID);
    }
}

输出:

Specified byte array: [10, 15, 1, 45, 13, 20, 71]
UUID value from byte: 15fe1179-e857-306b-ad67-b2388e006c8a