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Java 创建一个包含给定数量的随机整数的集合。

欢马劈雪

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创建一个包含给定数量的随机整数的集合。

实例源码：

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* 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. ");

}

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编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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