Unboxing - how does it become the best way to explicitly use intValue () compared to unboxing itself

Question

I read the O'REILLY Java8 pocket guide when I came across this unpacking tip [On page 30]

Note. For these examples, primitive variables end in capital. This is not an agreement.

The following example shows the acceptable but not recommended use of unboxing

Set Weight Gain

weightLimitP = weightLimitP + weightAllowanceW;

It is better to write this expression using the method intValue()as shown below:

weightLimitP = weightLimitP + weightAllowanceW.intValue();

Question . What I would like to know here, why is the second approach the best way? I mean, in what conditions is it "better." How is it different from unboxing in itself

Note. Shell class in this exampleInteger

Answer 1

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Answer 2

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