Rounds a float to a specified number of decimal places. - Java java.lang

Java examples for java.lang:Math Number

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Description

Rounds a float to a specified number of decimal places.

Demo Code


//package com.java2s;

public class Main {
    /**// w  w w .  ja v a2s .  c om
     * Rounds a float to a specified number of decimal places.
     * @param value the float value to round
     * @param decimalPlaces the amonut of decimal places
     * @return the rounded value
     */
    public static float round(float value, int decimalPlaces) {
        float power = (float) Math.pow(10, decimalPlaces);
        value = value * power;
        float tmp = Math.round(value);
        return (float) tmp / power;
    }

    /**
     * Rounds a double to a specified number of decimal places.
     * @param value the double value to round
     * @param decimalPlaces the amonut of decimal places
     * @return the rounded value
     */
    public static double round(double value, int decimalPlaces) {
        double power = Math.pow(10, decimalPlaces);
        value = value * power;
        double tmp = Math.round(value);
        return tmp / power;
    }
}

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