java.lang.Number doesn't implement “+” or any other operators?

Question

I\'m creating a class which is supposed to be able to be used with an array of any type of number (float, int, etc), so here is one method I have:

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Answer 1

Since every possible byte, short, char, int, float, double can be represented as a double its is much more efficient (as its a primitive instead of any object) and simpler to use double instead of Number You would need specific types if you need long accurately or BigDecimal or BigInteger.