Java Fraction Format format(double d, DecimalFormat unitFormatter)

Description

format

License

Open Source License

Declaration

protected static String format(double d, DecimalFormat unitFormatter) 

Method Source Code

//package com.java2s;
/*-/* ww  w . j av  a 2  s .  c  o m*/
 * Copyright (C) 2006-2008 Erik Larsson
 * 
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

import java.math.BigDecimal;
import java.math.MathContext;
import java.math.RoundingMode;
import java.text.DecimalFormat;

public class Main {
    protected static String format(double d, DecimalFormat unitFormatter) {
        final double rounded = roundDoubleToDecimals(d, unitFormatter.getMaximumFractionDigits());
        return unitFormatter.format(rounded);
    }

    public static double roundDoubleToDecimals(double d, int decimals) {
        long integerPart = (long) d;
        double remaining = d - integerPart;
        if (decimals > 0) {
            BigDecimal bd = new BigDecimal(remaining, new MathContext(decimals, RoundingMode.DOWN));
            return integerPart + bd.doubleValue();
        } else
            return (double) integerPart;
    }
}

Related

1. format(double d)
2. format(double d)
3. format(Double d, int digit)
4. format(double d, java.text.NumberFormat format)
5. format(double degrees)
6. format(double input, String format)