Java Random String generateRandomString(int stringLength)

Description

generate Random String

License

Apache License

Parameter

Parameter	Description
stringLength	the number of random alpha-numeric characters to add to the string

Return

a string containing random alpha-numeric characters

Declaration

public static String generateRandomString(int stringLength) 

Method Source Code

//package com.java2s;
/*/* w ww .java 2s .  co m*/
 * Copyright (c) 2017 Intel Corporation 
 *
 * 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 {
    /**
     * @param stringLength the number of random alpha-numeric characters to add
     * to the string
     * @return a string containing random alpha-numeric characters
     */
    public static String generateRandomString(int stringLength) {
        byte[] symbols = "abcdefghijklmnopqrstuvwxyz0123456789".getBytes();
        Random random = new Random();
        byte[] buffer = new byte[stringLength];
        for (int i = 0; i < stringLength; i++) {
            buffer[i] = symbols[random.nextInt(symbols.length)];
        }
        return new String(buffer);
    }
}

Related

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7. generateRandomString(Random random, int length)
8. generateRandomString(Random random, int size)
9. generateRandomString(Random rnd, char[] alphabet, int maxLength)