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, double increment)
round 
return Math.round(value / increment) * increment;
doubleround(double value, double precision)
rounding with decimal precision 
return Math.round(value / precision) * precision;
doubleround(double value, int decimal)
round 
long d = 1;
int c = decimal < 0 ? -decimal : decimal;
for (int i = 0; i < c; i++) {
    d = d * 10;
if (decimal >= 0) {
    return (double) Math.round(value * d) / d;
return Math.round(value / d) * d;
doubleround(double value, int decimal)
Rounds the passed value to the specified number of decimals. 
if (decimal <= 0)
    return value;
double p = Math.pow(10, decimal);
value = value * p;
return Math.round(value) / p;
doubleround(double value, int decimalPlace)
round 
double power_of_ten = 1;
while (decimalPlace-- > 0)
    power_of_ten *= 10.0;
return Math.round(value * power_of_ten) / power_of_ten;
doubleround(double value, int decimalPlaces)
Rounds the value with the specified number of decimal places. 
if (decimalPlaces < 0) {
    throw new IllegalArgumentException("Decimal places has to be non negative.");
} else if (decimalPlaces == 0) {
    return Math.round(value);
} else {
    final double factor = Math.pow(10, decimalPlaces);
    return Math.round(value * factor) / factor;
doubleround(double value, int decimalPlaces)
round 
double factor = Math.pow(10.0, decimalPlaces);
long longValue = Math.round(value * factor);
double result = longValue / factor;
return result;
doubleround(double value, int decimals)
Rounds given value to requested number of decimals 
if (decimals < 0) {
    throw new RuntimeException("Decimals must be positive or zero");
double powerOfTen = Math.pow(10.0, decimals);
double multipliedByPower = value * powerOfTen;
long rounded = Math.round(multipliedByPower);
double divided = (double) rounded / powerOfTen;
return divided;
...
doubleround(double value, int decimals)
round 
int base = (int) Math.pow(10, decimals);
return Math.floor(value * base) / base;
doubleround(double value, int exponent)
Round the value to the specified exponent 
double factor = Math.pow(10, exponent);
return Math.round(value * factor) / factor;