Java Double Number Round round(double x)

Description

A fast implementation of Math#round(double) .

License

Open Source License

Parameter

Parameter	Description
x	the argument

Declaration

public static int round(double x) 

Method Source Code

//package com.java2s;
/**// www.ja  va2  s  .c  om
 * Copyright (C) 1995-2014 levigo holding gmbh.
 *
 * This program 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.
 *
 * 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 {
    private static final int BIG_ENOUGH_INT = 16 * 1024;
    private static final double BIG_ENOUGH_ROUND = BIG_ENOUGH_INT + 0.5;

    /**
     * A fast implementation of {@link Math#round(double)}.
     * 
     * @param x the argument
     * @return
     */
    public static int round(double x) {
        return (int) (x + BIG_ENOUGH_ROUND) - BIG_ENOUGH_INT;
    }
}

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