Groovy as a substitute for Java when using BigDecimal?
- by geejay
I have just completed an evaluation of Java, Groovy and Scala.
The factors I considered were: readability, precision
The factors I would like to know: performance, ease of integration
I needed a BigDecimal level of precision.
Here are my results:
Java
void someOp()
{
BigDecimal del_theta_1 = toDec(6);
BigDecimal del_theta_2 = toDec(2);
BigDecimal del_theta_m = toDec(0);
del_theta_m = abs(del_theta_1.subtract(del_theta_2))
.divide(log(del_theta_1.divide(del_theta_2)));
}
Groovy
void someOp()
{
def del_theta_1 = 6.0
def del_theta_2 = 2.0
def del_theta_m = 0.0
del_theta_m = Math.abs(del_theta_1 - del_theta_2) / Math.log(del_theta_1 / del_theta_2);
}
Scala
def other(){
var del_theta_1 = toDec(6);
var del_theta_2 = toDec(2);
var del_theta_m = toDec(0);
del_theta_m = (
abs(del_theta_1 - del_theta_2)
/ log(del_theta_1 / del_theta_2)
)
}
Note that in Java and Scala I used static imports.
Java:
Pros: it is Java
Cons: no operator overloading (lots o methods), barely readable/codeable
Groovy:
Pros: default BigDecimal means no visible typing, least surprising BigDecimal support for all operations (division included)
Cons: another language to learn
Scala:
Pros: has operator overloading for BigDecimal
Cons: some surprising behaviour with division (fixed with Decimal128), another language to learn
