Java Number Round roundTo(double aValue, int aDigits)

Description

Rounds a double value to digit digits after the point.

License

Open Source License

Parameter

Parameter	Description
aValue	Value to be rounded.
aDigits	Digits the value should have after the point after the rounding.

Return

Double object that contains the rounded value.

Declaration

public static Double roundTo(double aValue, int aDigits) 

Method Source Code

//package com.java2s;
/*/*from  w  ww . j a  v a  2  s. c om*/
 * #%L
 * Cytoscape NetworkAnalyzer Impl (network-analyzer-impl)
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2006 - 2013
 *   Max Planck Institute for Informatics, Saarbruecken, Germany
 *   The Cytoscape Consortium
 * %%
 * 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 2.1 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 General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-2.1.html>.
 * #L%
 */

public class Main {
    /**
     * Rounds a double <code>value</code> to <code>digit</code> digits after the point.
     * 
     * @param aValue Value to be rounded. 
     * @param aDigits Digits the value should have after the point after the rounding.
     * @return <code>Double</code> object that contains the rounded <code>value</code>.       
     */
    public static Double roundTo(double aValue, int aDigits) {
        double d = Math.pow(10, aDigits);
        return new Double(Math.round(aValue * d) / d);
    }

    /**
     * Computes a relaxed power function.
     * 
     * @param a Base number.
     * @param b Power number.
     * @return <code>a<sup>b</sup></code> if <code>a</code> &ne; <code>0</code>; <code>0</code>
     *         otherwise.
     */
    public static double pow(double a, double b) {
        if (a != 0) {
            return Math.pow(a, b);
        }
        return 0;
    }
}

Related

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2. roundString(double n, double range, double precision)
3. roundTime24h(final long defaultUnitValue)
4. roundTimeStamp(long tstamp)
5. roundTimeValue(final float defaultUnitValue, final boolean is24HourFormatting)
6. roundTo(double d, int n)
7. roundTo(double num, int dp)
8. roundTo(double val, double prec)
9. roundTo(final double VALUE, final double TARGET)