Java Random Double randomDouble()

Description

random Double

License

Open Source License

Return

random double using XORShift random number generator

Declaration

public static double randomDouble() 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * This file is part of ASkyBlock./* w  w w  . j a  v a2s.c o m*/
 *
 *     ASkyBlock is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     ASkyBlock 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 ASkyBlock.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/

public class Main {
    private static Long x = System.nanoTime();

    /**
     * @return random double using XORShift random number generator
     */
    public static double randomDouble() {
        return (double) randomLong() / Long.MAX_VALUE;
    }

    /**
     * @return random long number using XORShift random number generator
     */
    public static long randomLong() {
        x ^= (x << 21);
        x ^= (x >>> 35);
        x ^= (x << 4);
        return Math.abs(x);
    }
}

Related

1. randomDouble()
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