Java ThreadLocalRandom shuffle(final T[] array)

Description

Shuffle the elements in the given array.

License

Apache License

Declaration

public static <T> T[] shuffle(final T[] array) 

Method Source Code

//package com.java2s;
/**// ww w  .  j a  v a  2s .c  o m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.concurrent.ThreadLocalRandom;

public class Main {
    /** Shuffle the elements in the given array. */
    public static <T> T[] shuffle(final T[] array) {
        if (array != null && array.length > 0) {
            for (int n = array.length; n > 1;) {
                final int randomIndex = ThreadLocalRandom.current()
                        .nextInt(n);
                n--;
                if (n != randomIndex) {
                    final T tmp = array[randomIndex];
                    array[randomIndex] = array[n];
                    array[n] = tmp;
                }
            }
        }
        return array;
    }
}

Related

1. randomString(int minLength, int maxLength)
2. randomString(List strings)
3. randomStringArray(int arrayLength, int stringLength)
4. randomWorld()
5. randomWorld()
6. shuffle(T[] arr)
7. shuffle(T[] array)
8. shuffleArray(int[] ar)
9. timestampToMicros(final long timestampMillis)