java生成系统唯一性十六进制字符串

import java.util.Random;


public class Randt {


public static void main(String[] args) {

long ti=System.currentTimeMillis();
    int re=Math.abs(new Random().nextInt());


    int per=new Random().nextInt(10);
    String pp=per+"001010200200";
    long cu=Long.parseLong(pp);


        String value =cu+ti+re+"";
        
        String pre=Integer.toHexString(new Random().nextInt(16));


        System.out.println(pre+Long.toHexString(Long.parseLong(value)));


}


}