Java Random String getRandomString(Random random, int minLen, int maxLen)

Description

get Random String

License

Apache License

Parameter

Parameter	Description
random	Random instance
minLen	minimum number of characters
maxLen	maximum number of characters

Return

String of alphabetical characters, with the first character uppercase (Proper case strings).

Declaration

public static String getRandomString(Random random, int minLen, int maxLen) 

Method Source Code

//package com.java2s;
/**/*from  w w w .  j  ava 2 s.c  o m*/
 * Useful String utilities for common tasks
 *
 * @author Ken Partlow
 * @author John DeRegnaucourt (john@cedarsoftware.com)
 *         <br>
 *         Copyright (c) Cedar Software LLC
 *         <br><br>
 *         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
 *         <br><br>
 *         http://www.apache.org/licenses/LICENSE-2.0
 *         <br><br>
 *         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 random Random instance
     * @param minLen minimum number of characters
     * @param maxLen maximum number of characters
     * @return String of alphabetical characters, with the first character uppercase (Proper case strings).
     */
    public static String getRandomString(Random random, int minLen, int maxLen) {
        StringBuilder s = new StringBuilder();
        int length = minLen + random.nextInt(maxLen - minLen + 1);
        for (int i = 0; i < length; i++) {
            s.append(getRandomChar(random, i == 0));
        }
        return s.toString();
    }

    public static String getRandomChar(Random random, boolean upper) {
        int r = random.nextInt(26);
        return upper ? "" + (char) ((int) 'A' + r) : "" + (char) ((int) 'a' + r);
    }
}

Related

1. getRandomString(int size)
2. getRandomString(int size)
3. getRandomString(int size)
4. getRandomString(int size)
5. getRandomString(int strLength)
6. getRandomString(Random random, int totalLength, int randomSectionLength)
7. getRandomString(Random rnd, int minLength, int maxLength)
8. getRandomString(String paramString, int paramLength)
9. getRandomStringByLength(int length)