Java Decimal Round roundDouble(Double val, int precision)

Description

round Double

License

Open Source License

Declaration

public static double roundDouble(Double val, int precision) 

Method Source Code

//package com.java2s;
/*/*from   w w  w .j  av  a 2  s. c o m*/
 * Copyright (c) 2013. Chandra Tungaturthi
 *
 * This program 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 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.math.BigDecimal;
import java.math.MathContext;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.*;

import java.util.logging.Level;
import java.util.logging.Logger;

public class Main {
    private static final Logger mylogger = Logger.getLogger("com.lia.core");

    public static double roundDouble(Double val, int precision) {

        Double dVal = adjDecimalSep(val);

        BigDecimal bigNumber1 = new BigDecimal(dVal, MathContext.UNLIMITED); // dec 64 - > double precision
        return bigNumber1.setScale(precision, BigDecimal.ROUND_CEILING).doubleValue();

    }

    public static double adjDecimalSep(double value) {
        mylogger.log(Level.FINE, "Adjusting valu {0}", new Object[] { value });
        // Bug fix: 
        //        For german locale 3.333 => 3,33 which would raise an error 
        DecimalFormatSymbols otherSymbols = new DecimalFormatSymbols(Locale.getDefault());
        otherSymbols.setDecimalSeparator('.');
        otherSymbols.setGroupingSeparator(',');
        // Bug fix
        DecimalFormat newFormat = new DecimalFormat();
        newFormat.setDecimalFormatSymbols(otherSymbols);
        return Double.valueOf(newFormat.format(value));

    }
}

Related

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2. roundDistanceFromMeterToKm(final double distanceInMeter)
3. roundDouble(double iVal)
4. roundDouble(double num, int decimal)
5. roundDouble(double numero, int ceros_a_la_derecha)
6. roundedNumber(double inVal)
7. RoundFractionalTons(double d)
8. roundNumDecimals(double d, int num)
9. roundOffToTwoDecimal(double value)