Here you can find the source of getRandomString(int length)
| Parameter | Description |
|---|---|
| length | Length of the returned String |
public static String getRandomString(int length)
//package com.java2s; /** /*w ww . j a v a2s. co m*/ * Copyright 2013 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ import java.util.Random; public class Main { /** * Generates a random name, generated with {@link java.util.Random} and an Alphabet of 0-9,a-z,A-Z <br/> * e.g. for the Mailbox * * @param length * Length of the returned String * @return a randomly generated String consisting of a-z,A-Z and 0-9 */ public static String getRandomString(int length) { char[] values = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', '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', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' }; Random random = new Random(); StringBuffer stringBuf = new StringBuffer(); for (int i = 0; i < length; i++) { // generates a random number and stores it in the stringbuffer stringBuf.append(values[Math.abs(random.nextInt()) % (values.length)]); } return stringBuf.toString(); } }