Here you can find the source of randomArray(int min, int max, int n)
| Parameter | Description |
|---|---|
| min | minimum of the range |
| max | maximum of the range |
| n | number to be generated |
public static int[] randomArray(int min, int max, int n)
//package com.java2s; /**//from w w w .jav a 2 s.c om * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. */ public class Main { /** * Generate n random and different numbers within * specified non-negative integer range * @param min minimum of the range * @param max maximum of the range * @param n number to be generated */ public static int[] randomArray(int min, int max, int n) { if (n > (max - min + 1) || max < min || min < 0 || max < 0) { return null; } int[] result = new int[n]; for (int i = 0; i < n; i++) { result[i] = -1; } int count = 0; while (count < n) { int num = (int) (Math.random() * (max - min)) + min; boolean flag = true; for (int j = 0; j < n; j++) { if (num == result[j]) { flag = false; break; } } if (flag) { result[count] = num; count++; } } return result; } }