Java Random Int random(int n)

Description

Get a random integer between 0 and n-1.

License

Open Source License

Parameter

Parameter	Description
n	The upper bound on the value returned.

Return

A non-negative value r that is strictly less than n and is difficult to predict.

Declaration

static int random(int n) 

Method Source Code

//package com.java2s;
/**/*from  ww  w . j  a v  a  2s.  c  om*/
 * Copyright (c) 2013-14 Samuel A. Rebelsky.  All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Lesser GNU General Public License as published 
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Get a random integer between 0 and n-1.
     *
     * @param n
     *   The upper bound on the value returned.
     * @return
     *   A non-negative value r that is strictly less than n and
     *   is difficult to predict.
     */
    static int random(int n) {
        return (int) Math.floor(n * Math.random());
    }

    /**
     * Get a random number between 0 and n-1.
     *
     * @param n
     *   The upper bound on the value returned.
     * @return
     *   A non-negative value r that is strictly less than n and
     *   is difficult to predict.
     */
    static long random(long n) {
        return (long) Math.floor(n * Math.random());
    }
}

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2. random(int min, int max)
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7. random(int numSamples)
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