Java Random Int randInt(int n)

Description

Generates a random integer in the range [0,n).

License

Open Source License

Parameter

Parameter	Description
n	- maximum value (exclusive)

Return

- random integer

Declaration

public static int randInt(int n) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    /**/*from ww  w . j  av  a2 s. c o  m*/
     * Generates a random integer in the range [0,n).
     * 
     * @param n - maximum value (exclusive)
     * @return - random integer
     */
    public static int randInt(int n) {
        return (int) randInt(0, n);
    }

    /**
     * Generates a random integer in the given range.
     * 
     * @param minrange - minumum value (inclusive)
     * @param maxrange - maximum value (exclusive)
     * @return - random integer
     */
    public static int randInt(int minrange, int maxrange) {
        return (int) randRealUniform(minrange, maxrange);
    }

    /**
     * Generates a random real number in the given range. 
     * 
     * @param minrange - minimum value
     * @param maxrange - maximum value
     * @return - random number
     */
    public static double randRealUniform(double minrange, double maxrange) {
        return minrange + (Math.random() * (maxrange - minrange));
    }
}

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