Creates a random array of numbers. - Java java.lang

Java examples for java.lang:Math Array Function

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Description

Creates a random array of numbers.

Demo Code


//package com.java2s;
import java.util.ArrayList;

public class Main {
    /**// w ww  .jav  a2  s. c o m
     * Creates a random array of numbers.
     * 
     * @param size
     *            The amount of random numbers to create.
     * @return A random array of numbers.
     */
    public static int[] generateRandomArray(final int size) {

        ArrayList<Integer> al = new ArrayList<Integer>();
        for (int x = 0; x < size; x++) {
            Integer i = new Integer(x);
            al.add(i);
        }

        int[] result = new int[size];
        for (int x = 0; x < size; x++) {
            int randomSpotInList = (int) (Math.random() * al.size());
            Integer i = (Integer) al.get(randomSpotInList);
            result[x] = (int) i.intValue();
            al.remove(randomSpotInList);
        }
        return result;
    }
}

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