Java Array Shuffle shuffle(double[] arr, Random rnd)

Description

Randomly permute the given double array.

License

Open Source License

Parameter

Parameter	Description
arr	The array to shuffle.
rnd	The randomness source to use.

Declaration

public static void shuffle(double[] arr, Random rnd) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * This file is part of jasima, v1.3, the Java simulator for manufacturing and 
 * logistics.// w  w w . j  a  v a 2  s .  c o m
 *  
 * Copyright (c) 2015       jasima solutions UG
 * Copyright (c) 2010-2015 Torsten Hildebrandt and jasima contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/

import java.util.Random;

public class Main {
    /**
     * Randomly permute the given double array.
     * 
     * @param arr
     *            The array to shuffle.
     * @param rnd
     *            The randomness source to use.
     */
    public static void shuffle(double[] arr, Random rnd) {
        // Shuffle array
        for (int i = arr.length - 1; i > 0; i--) {
            int j = rnd.nextInt(i + 1);

            double tmp = arr[i];
            arr[i] = arr[j];
            arr[j] = tmp;
        }
    }

    /**
     * Randomly permute the given int array.
     * 
     * @param arr
     *            The array to shuffle.
     * @param rnd
     *            The randomness source to use.
     */
    public static void shuffle(int[] arr, Random rnd) {
        // Shuffle array
        for (int i = arr.length - 1; i > 0; i--) {
            int j = rnd.nextInt(i + 1);

            int tmp = arr[i];
            arr[i] = arr[j];
            arr[j] = tmp;
        }
    }
}

Related

1. shuffle()
2. shuffle(byte[] array)
3. shuffle(byte[] values, Random rnd)
4. shuffle(Collection items, Random random)
5. shuffle(Collection objects)
6. Shuffle(double[] array)
7. shuffle(double[] array, Random r)
8. shuffle(double[][] kernel, long seed)
9. shuffle(final A source, final Random random)