Java Utililty Methods Double Number Round

List of utility methods to do Double Number Round

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Description

The list of methods to do Double Number Round are organized into topic(s).

Method

doubleround(double value, int scalar, int standard)
round 
return Double.parseDouble(round(String.valueOf(value), scalar, standard));
doubleround(double valueToRound, int numberOfDecimalPlaces)
round 
if (Double.isNaN(valueToRound))
    return Double.NaN;
double multipicationFactor = Math.pow(10, numberOfDecimalPlaces);
double interestedInZeroDPs = valueToRound * multipicationFactor;
return Math.round(interestedInZeroDPs) / multipicationFactor;
doubleround(double valueToTruncate, int requiredDecimalPlaces)
round 
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); 
return ((double) roundedScaledValueToTruncate) / scalingFactor;
doubleround(double what, int howmuch)
round 
return (double) ((int) (what * Math.pow(10, howmuch) + .5)) / Math.pow(10, howmuch);
doubleround(double x)
round 
return Math.floor((x + 0.5));
intround(double x)
A fast implementation of Math#round(double) . 
return (int) (x + BIG_ENOUGH_ROUND) - BIG_ENOUGH_INT;
intround(double x)
Data un valore decimale ritorna un intero che lo arrotondato 
return (int) Math.round(x);
doubleround(double x)
round 
return round(x, 1);
doubleround(double x, int numPlaces)
round 
double scale = Math.pow(10, numPlaces);
return Math.round(x * scale) / scale;
doubleround(double x, int places)
round 
long m = pow(10, places);
return Math.rint(x * m) / m;