Java Array Shuffle shuffle(Object[] a, Random r)

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Description

shuffle array

License

Open Source License

Declaration 

public static void shuffle(Object[] a, Random r)

Method Source Code


//package com.java2s;
//License from project: Open Source License 

import java.util.*;

public class Main {
    /**//from  www.  ja va 2  s .c om
     * shuffle array
     */
    public static void shuffle(Object[] a, Random r) {
        for (int n = 0; n < a.length; n++) {
            // don't just pick random position!
            int x = r.nextInt(a.length - n) + n;
            Object o = a[n];
            a[n] = a[x];
            a[x] = o;
        }
    }
}

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