Java Double Number Round roundDouble(double d, int place)

Description

round Double

License

Open Source License

Declaration

public static String roundDouble(double d, int place) 

Method Source Code

//package com.java2s;
/*************************************************************************
 * Clus - Software for Predictive Clustering                             *
 * Copyright (C) 2007                                                    *
 *    Katholieke Universiteit Leuven, Leuven, Belgium                    *
 *    Jozef Stefan Institute, Ljubljana, Slovenia                        *
 *                                                                       *
 * 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/>. *
 *                                                                       *
 * Contact information: <http://www.cs.kuleuven.be/~dtai/clus/>.         *
 *************************************************************************/

public class Main {
    public static String roundDouble(double d, int place) {
        if (place <= 0)
            return String.valueOf((int) (d + ((d > 0) ? 0.5 : -0.5)));
        String s = "";
        if (d < 0) {
            s += "-";
            d = -d;//w ww.java  2s  . c om
        }
        d += 0.5 * Math.pow(10, -place);
        if (d > 1) {
            int i = (int) d;
            s += i;
            d -= i;
        } else {
            s += "0";
        }
        if (d > 0) {
            d += 1.0;
            String f = "" + (int) (d * Math.pow(10, place));
            s += "." + f.substring(1);
        }
        return s;
    }
}

Related

1. roundDecimals(double x, int decimals)
2. roundDiv(double a, double b)
3. roundDouble(double d)
4. roundDouble(double d)
5. roundDouble(double d, int decimals)
6. roundDouble(double d, int places)
7. roundDouble(double num, int precision)
8. roundDouble(double number, int precision)
9. roundDouble(double pDouble, int pPlaces)