Java Random String getRandomString(int length)

Description

get Random String

License

Open Source License

Declaration

public static String getRandomString(int length) 

Method Source Code

//package com.java2s;

import java.util.Random;

public class Main {

    public static String getRandomString(int length) {
        String base = "abcdefghijklmnopqrstuvwxyz0123456789";
        return getRandomString(base, length);
    }// w  ww  .  j a  va 2  s  .c  om

    public static String getRandomString(String source, int length) {
        String rdm = null;
        if (notNOE(source)) {
            Random random = new Random();
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < length; i++) {
                int number = random.nextInt(source.length());
                sb.append(source.charAt(number));
            }
            rdm = sb.toString();
        }
        return rdm;
    }

    public static boolean notNOE(String param) {
        return !isNullOrEmpty(param);
    }

    public static boolean isNullOrEmpty(String param) {
        if (null == param || param.isEmpty())
            return true;
        return false;
    }
}

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