What's a good way to generate 100,000 non-repeating 13-bit pure numeric strings

What's a good way to generate 100,000 non-repeating 13-bit pure numeric strings

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What's a good way to generate 100,000 non-repeating 13-bit pure numeric strings

Come on. Starting from 13 0, add 1 at a time ...

Available timestamps to be generated, or followed by random numbers

Package Com.xtl.demo;import Java.util.hashset;import Java.util.random;import java.util.set;/** * Generates 20 groups of 13-digit random numbers that are not duplicated * @ Author Xiatianlong * * @date October 8, 2016 morning 11:44:57 */public class Creatrandomnumber {public static void main (S Tring[] (args) {Set
  
   
    numberset = new HashSet 
    
     ();            while (true) {//Quantity greater than 20 is the end if (Numberset.size () >20) {break;            } String Randomnumber = Createrandomnumber (13);        Numberset.add (Randomnumber);        } for (string string:numberset) {System.out.println (string); }}/** * Generates a random number of digits * @param length * The number of bits generated * @return * */public static Strin        G Createrandomnumber (int length) {String number = ""; for (int i = 0; I 
     
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没怎么考虑性能。。。

Random one-way encryption characters and add salt, take 13 bit not on the line.

Python available random.sample :

  random.sample (range (10**12, 10**13), 10**5)  

Python2 with xrange , if you want to start with format from zero.

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