How to generate GUID in Java

This article is a detailed analysis and introduction to the method of generating GUID in Java. Friends who need it can refer to it

GUID is a 128-bit long number, generally expressed in hexadecimal. The core idea of ​​the algorithm is to generate a GUID by combining the machine's network card, local time, and a random number. Theoretically, if a machine generates 10,000,000 GUIDs per second, it is guaranteed (in a probabilistic sense) that it will not repeat for 3240 years.

The code is as follows:

package com.cn.str;import java.util.UUID;/** * Create GUID * @author Administrator * */public class CreateGUID { public static final String GenerateGUID(){  UUID uuid = UUID.randomUUID();  return uuid.toString();   } /**  * @param args  */ public static void main(String[] args) {  // TODO Auto-generated method stub  System.out.println(GenerateGUID()); }}

UUID is a new class added in 1.5. Under java.util, it can be used to generate a so-called globally unique ID

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