Java ThreadLocalRandom getRandomString(int length)

Description

get Random String

License

Apache License

Declaration

public static String getRandomString(int length) 

Method Source Code

//package com.java2s;
/*/*from  w w w .  j  a va2s .c  o  m*/
 * Copyright 2014 zhanhb.
 *
 * 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;
import java.util.concurrent.ThreadLocalRandom;

public class Main {
    public static String getRandomString(int length) {
        return getRandomString(length, ThreadLocalRandom.current());
    }

    public static String getRandomString(int length, Random random) {
        char[] val = new char[length];
        for (int i = 0; i < length; ++i) {
            int x = random.nextInt(62);
            switch ((x + 16) / 26) {
            case 0:
                val[i] = (char) (x + '0');
                break;
            case 1:
                val[i] = (char) (x + 'A' - 10);
                break;
            case 2:
                val[i] = (char) (x + 'a' - 36);
                break;
            }
        }
        return new String(val);
    }
}

Related

1. getRandomInteger()
2. getRandomIntegerElement(List list)
3. getRandomNumbers(Integer startNumber, Integer endNumber, Integer pageSize, Integer numNumbers)
4. getRandomPassword()
5. getRandomStr(int len)
6. getRandomTarget(List targets)
7. getRandomValue(String prefix, long maxValue)
8. getTempPersistFileName(String baseFileName)
9. getThreadLocalRandom()