Java Double Number Round round(double valueToTruncate, int requiredDecimalPlaces)

Description

round

License

Open Source License

Declaration

public static double round(double valueToTruncate, int requiredDecimalPlaces) 

Method Source Code

//package com.java2s;
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public class Main {
    public static double round(double valueToTruncate, int requiredDecimalPlaces) {
        assert requiredDecimalPlaces >= 0 : "Can't round to a negative number of decimal places!";
        double scalingFactor = Math.pow(10d, requiredDecimalPlaces);
        double scaledValueToTruncate = valueToTruncate * scalingFactor;
        int roundedScaledValueToTruncate = (int) (scaledValueToTruncate + 0.5d); // rely on int just chopping off values after decimal place
        return ((double) roundedScaledValueToTruncate) / scalingFactor;
    }
}

Related

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2. round(double value, int precision)
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4. round(double value, int scalar, int standard)
5. round(double valueToRound, int numberOfDecimalPlaces)
6. round(double what, int howmuch)
7. round(double x)
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9. round(double x)