Java Random Int randomString(int min, int max)

Description

Returns a random string for captchas

License

Apache License

Parameter

Parameter	Description
min	minimum value
max	maxumum value;

Return

random string for capture

Declaration

public static String randomString(int min, int max) 

Method Source Code

//package com.java2s;
/*/*ww  w  . jav a2s .  c  o  m*/
 * Copyright 2009-2011 Carsten Hufe devproof.org
 *
 * 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 {
    /**
     * Returns a random string for captchas
     *
     * @param min minimum value
     * @param max maxumum value;
     * @return random string for capture
     */
    public static String randomString(int min, int max) {
        int num = randomInt(min, max);
        byte b[] = new byte[num];
        for (int i = 0; i < num; i++) {
            b[i] = (byte) randomInt('a', 'z');
        }
        return new String(b);
    }

    /**
     * Random integer value
     *
     * @param min minimal value
     * @param max maximum value
     * @return random int value
     */
    private static int randomInt(int min, int max) {
        return (int) (Math.random() * (max - min) + min);
    }
}

Related

1. randomString(int count)
2. randomString(int length)
3. randomString(int length)
4. randomString(int length)
5. randomString(int length)
6. randomString(int numChar)
7. randomString(int size)
8. randomString(int size, String... keys)
9. randomStringNumbers(int len)