I've made an interface of math operation with one method, calculate, taking various number of arguments
public interface MathOperation {
public <T extends Number> T calculate(T... args);
}
There's also simple implementation of this class, which does not work:
private class Sum implements MathOperation {
@Override
public <T extends Number> T calculate(T... args) {
return args[0] + args[1];
}
}
The problem is:
bad operand types for binary operator '+'
first type: T
second type: T
where T is a type-variable:
T extends Number declared in method <T>calculate(T...)
What I'm trying to achieve is a simple class, taking for example two Doubles and returning Double as well.
Is there possibility to achieve this?
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