Java Random String getRandomString(int length)

Description

get Random String

License

Apache License

Declaration

public static String getRandomString(int length) 

Method Source Code

//package com.java2s;
/**/*w  ww  .  j ava  2 s  .c  om*/
  *  Copyright (c) 2014 http://www.lushapp.wang
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  */

import java.util.*;

public class Main {

    public static String getRandomString(int length) {
        StringBuffer bu = new StringBuffer();
        String[] arr = { "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j",
                "k", "m", "n", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E", "F",
                "G", "H", "I", "J", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };
        Random random = new Random();
        while (bu.length() < length) {
            String temp = arr[random.nextInt(57)];
            if (bu.indexOf(temp) == -1) {
                bu.append(temp);
            }
        }
        return bu.toString();
    }
}

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