Java Double Number Round round(final double num, final int prec)

Description

round

License

Open Source License

Declaration

public static double round(final double num, final int prec) 

Method Source Code

//package com.java2s;
/*/*from   w ww  . j a  v a2 s  .co  m*/
 * Copyright (C) Justo Montiel, David Torres, Sergio Gomez, Alberto Fernandez
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see
 * <http://www.gnu.org/licenses/>
 */

public class Main {
    public static double round(final double num, final int prec) {
        final double epsilon = 1.0e-4;
        double r, rs, x, result;
        double factor;

        factor = Math.pow(10, prec);
        x = num * factor;
        r = Math.round(x);
        if (r < x) {
            rs = Math.round(x + epsilon);
            if (rs - r > 0.5) {
                r = rs;
            }
        }
        return r / factor;
    }
}

Related

1. round(double zahl, int stellen)
2. round(double[] arr)
3. round(double[] array, int decimals)
4. round(double[][] data)
5. round(final double num)
6. round(final double numberToRound, final int decimalPlaces)
7. round(final double v)
8. round(final double val, final int decimalPlaces)
9. round(final double val, final int decimals)