Java Random Number getRandomNumber(final int from, final int to)

Description

Returns a random number between the from and to parameters.

License

Apache License

Parameter

Parameter	Description
from	The lowest allowable number.
to	The highest allowable number.

Return

Random number between from and to.

Declaration

public static int getRandomNumber(final int from, final int to) 

Method Source Code

//package com.java2s;
/*/*w w  w  . j av a  2s.com*/
 *  Copyright 2011 Eric F. Savage, code@efsavage.com
 *
 *   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.Random;

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

    /**
     * Returns a random number between the from and to parameters.
     * 
     * @see Random#nextDouble()
     * @param from
     *            The lowest allowable number.
     * @param to
     *            The highest allowable number.
     * @return Random number between from and to.
     */
    public static int getRandomNumber(final int from, final int to) {
        return from + (int) Math.floor(random.nextDouble() * ((to + 1) - from));
    }

    /**
     * Returns a random number between the from and to parameters.
     * 
     * @see Random#nextDouble()
     * @param from
     *            The lowest allowable number.
     * @param to
     *            The highest allowable number.
     * @return Random number between from and to.
     */
    public static long getRandomNumber(final long from, final long to) {
        return from + (long) (random.nextDouble() * (to - from));
    }
}

Related

1. getRandomNumber()
2. getRandomNumber()
3. getRandomNumber()
4. getRandomNumber()
5. getRandomNumber()
6. getRandomNumber(final int maxInt, final int minInt)
7. getRandomNumber(int bit)
8. getRandomNumber(int bound)
9. getRandomNumber(int digit)