Java唯一标识符

一、使用java.rmi.dgc.VMID

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public class Main {     public static void main(String arg[]) {       System.out.println(new java.rmi.dgc.VMID().toString());     }   }   //4129eb1d7419293f:-148094f1:11fc9788387:-8000 

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二、使用java.util.UUID

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import java.util.UUID;     public class Main {     public static void main(String arg[]) {       System.out.println(UUID.randomUUID());     }   }   //138a4222-e898-484f-8347-dafc01c5b03b  

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