Java Double Number Round round(double val, int places)

Description

AUTHOR : Ravi Kiran DATE : 18-08-06 NAME : round DESCRIPTION : Round a double value to a specified number of decimal places ARGUMENTS : val - the value to be rounded places - the number of decimal places to round to RETURNS : val - rounded to places decimal places NOTES : None CHANGE HISTROY Author Date Description

License

Open Source License

Declaration

private static double round(double val, int places) 

Method Source Code

//package com.java2s;
/*****************************************************************************************
 * Copyright (c) 2009 Hewlett-Packard Development Company, L.P.
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
 * Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:/*from  w  ww.  ja  v  a2s.  c o m*/
 *
 * The above copyright notice and this permission notice shall be included in all 
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *****************************************************************************************/

public class Main {
    /**********************************************************************************
     * AUTHOR      : Ravi Kiran
     * DATE         : 18-08-06
     * NAME         : round
     * DESCRIPTION   : Round a double value to a specified number of decimal places
     * ARGUMENTS   : val - the value to be rounded
     *               places - the number of decimal places to round to
     * RETURNS      : val - rounded to places decimal places
     * NOTES      : None
     * CHANGE HISTROY
     * Author         Date            Description 
     *************************************************************************************/
    private static double round(double val, int places) {
        long factor = 0;
        long tmp = 0;
        try {
            factor = (long) Math.pow(10, places);

            // Shift the decimal the correct number of places
            // to the right.
            val = val * factor;

            // Round to the nearest integer.
            tmp = Math.round(val);
        } catch (Exception exception) {
            System.err
                    .println("JAVA UI Interface: Exception occured in LipiTKUtil while triming float value :"
                            + exception.toString());
        }

        // Shift the decimal the correct number of places
        // back to the left.
        return (double) tmp / factor;
    }

    /**********************************************************************************
     * AUTHOR      : Ravi Kiran
     * DATE         : 18-08-06
     * NAME         : round
     * DESCRIPTION   : Round a float value to a specified number of decimal places
     * ARGUMENTS   : val - the value to be rounded
     *               places - the number of decimal places to round to
     * RETURNS      : val - rounded to places decimal places
     * NOTES      : None
     * CHANGE HISTROY
     * Author         Date            Description 
     *************************************************************************************/
    public static float round(float val, int places) {
        return (float) round((double) val, places);
    }
}

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