Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/* Copyright (C) 2016 Siu-Kei Muk, Snigdha Brahma
 * All rights reserved.
 *
 * This software may be modified and distributed under the terms
 * of the BSD license.  See the LICENSE file for details.
 */

import java.math.BigDecimal;

public class Main {
    public static final int MAXDIGIT = 14;
    public static final int MAXDECIMAL = 9;

    public static double round(double d) {
        if (Double.isNaN(d) || Double.isInfinite(d))
            return d;
        int digits = leadingDigits(d);
        int roundToDecimal = Math.min(MAXDIGIT - digits, MAXDECIMAL);
        double rounded = BigDecimal.valueOf(d).setScale(roundToDecimal, BigDecimal.ROUND_HALF_UP).doubleValue();
        return rounded;
    }

    private static int leadingDigits(double d) {
        int digits = 0;
        while (Math.abs(d) >= 1) {
            digits++;
            d /= 10.0;
        }
        return digits;
    }
}