Java Number Round roundPower10(float val, int powerOf10)

Description

Round a float to a particular power of 10

License

Open Source License

Parameter

Parameter	Description
val	float value to display

Declaration

public static float roundPower10(float val, int powerOf10) 

Method Source Code

//package com.java2s;
/*/*w w  w . j  a  va 2  s.co m*/
 *  Copyright (C) 2004  The Concord Consortium, Inc.,
 *  10 Concord Crossing, Concord, MA 01742
 *
 *  Web Site: http://www.concord.org
 *  Email: info@concord.org
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * END LICENSE */

public class Main {
    /**
     * Round a float to a particular power of 10
     * 
     * @param val   float value to display
     */
    public static float roundPower10(float val, int powerOf10) {
        double precision = Math.pow(10, powerOf10);
        double mantisa = Math.floor((val / precision) + 0.5);
        float value = (float) (mantisa * precision);
        return value;
    }
}

Related

1. roundPhred(final double value, final double phredScorePrecision)
2. roundPos(final float a)
3. roundPositive(float value)
4. roundPositive(float x)
5. roundPositiveIntToPowerOf2(int i)
6. roundPower2(final long x)
7. roundRadian(double rad)
8. roundRobin(final int value)
9. roundScale(double value, int scale)