Java Random Byte Array generateRandomByteArray(int length)

Description

generate Random Byte Array

License

Apache License

Declaration

public static byte[] generateRandomByteArray(int length) 

Method Source Code

//package com.java2s;
/*//w w w  . ja  va2s  .c  om
 * Copyright 2011-2012 Andrea Parodi.
 *
 * 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.
 */

public class Main {
    public static byte[] generateRandomByteArray(int length) {
        return generateRandomByteArray(length, false, (byte) 0);
    }

    public static byte[] generateRandomByteArray(int length, boolean avoid, byte avoidByte) {
        byte[] line = new byte[length];
        for (int i = 0; i < length; i++) {
            //Choose a random byte - if we're generating delimited lines then make sure we don't
            //choose first byte of delim
            byte rand;
            do {
                rand = (byte) ((int) (Math.random() * 255) - 128);
            } while (avoid && rand == avoidByte);

            line[i] = rand;
        }
        return line;
    }
}

Related

1. generateRandomArray()
2. generateRandomBlob()
3. generateRandomByteArray(int length)
4. generateRandomByteArray(int length, boolean avoid, byte avoidByte)
5. generateRandomByteArray(int size)
6. generateRandomByteArray(int size, Random rnd)
7. generateRandomBytes()