Java Random Int getRandomInt(int lower, int upper)

Description

get Random Int

License

Open Source License

Declaration

public static int getRandomInt(int lower, int upper) 

Method Source Code

//package com.java2s;
/*// w  ww .  j  a  v  a2 s .co  m
 * *********************************************************************
 * Copyright (c) 2010 Pedro Gomes and Universidade do Minho.
 * All rights reserved.
 * 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.
 *
 * ********************************************************************
 */

import java.util.*;

public class Main {
    private static Random rand = new Random();

    public static int getRandomInt(int lower, int upper) {

        int num = (int) Math.floor(rand.nextDouble() * ((upper + 1) - lower));
        if (num + lower > upper || num + lower < lower) {
            System.out.println("ERROR: Random returned value of of range!");
            System.exit(1);
        }
        return num + lower;
    }
}

Related

1. getRandomInt(final int maxValue)
2. getRandomInt(final int min, final int max, final Random random)
3. getRandomInt(int bound)
4. getRandomInt(int intStart, int intEnd)
5. getRandomInt(int lower, int upper)
6. getRandomInt(int max)
7. getRandomInt(int max)
8. getRandomInt(int max)
9. getRandomInt(int min, int max)