Java Double Number Round round(double d, int decimalPlacesRequired)

Description

Reduces the precision of a double to a specified number of decimal places.

License

Open Source License

Parameter

Parameter	Description
d	number to reduce precision
decimalPlacesRequired	the number of required decimal places

Return

d reduced to the specified precision

Declaration

public static final double round(double d, int decimalPlacesRequired) 

Method Source Code

//package com.java2s;
/** A collection of mathematical utility functions.
 * <p>//from  w ww.  jav  a2s  . co m
 * Copyright (c) 2008 Eric Eaton
 * <p>
 * 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.
 * <p>
 * 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.
 * <p>
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * @author Eric Eaton (EricEaton@umbc.edu) <br>
 *         University of Maryland Baltimore County
 *
 * @version 0.1
 *
 */

public class Main {
    /** Reduces the precision of a double to a specified number of decimal places.
     * @param d number to reduce precision
     * @param decimalPlacesRequired the number of required decimal places
     * @return d reduced to the specified precision
     */
    public static final double round(double d, int decimalPlacesRequired) {
        double factor = Math.pow(10, decimalPlacesRequired);
        return Math.round((d * factor)) / factor;
    }
}

Related

1. round(double d)
2. round(double d)
3. round(double d)
4. round(double d)
5. round(double d)
6. round(double d, int decimals)
7. round(double d, int i)
8. round(double d, int numDecimal)
9. round(double d, int p)