创建一个包含给定数量的随机整数的集合。

/*

 * Copyright JTheque (Baptiste Wicht)

 *

 * 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.

 */

//package com.nowjava;// 来自 n o w    j a v a  . c o m

import java.util.ArrayList;

import java.util.Collection;


import java.util.Random;


public class Main {

    public static void main(String[] argv) throws Exception {

        int size = 2;

        System.out.println(newRandomIntegerList(size));

    }


    private static final Random RANDOM = new Random();


    /**

     * Create a collection containing the given number of random integers.

     *

     * @param size The size of the collection.

     *

     * @return A Collection containing the given number of random integers.

     *

     * @throws IllegalArgumentException If size is less than 0.

     */

    public static Collection<Integer> newRandomIntegerList(int size) {

        if (size < 0) {

            throw new IllegalArgumentException(

                    "Size cannot be less than 0. ");

        }

        /**来自