Java Method invocation vs using a variable

Question

Recently I got into a discussion with my Team lead about using temp variables vs calling getter methods. I was of the opinion for a long time that, if I know that I was goin

Answer 1

A general comment: In any modern system, except for I/O, do not worry about performance issues. Blazing fast CPUs and heaps of memory mean, all other issues are most of the time completely immaterial to actual performance of your system. [Of course, there are exceptions like caching solutions but they are far and rare.]

Now coming to this specific problem, yes, compiler will inline all the gets. Yet, even that is not the actual consideration, what should really matter is over all readability and flow of your code. Replacing indirections by a local variable is better, if the call used multiple times, like customer.gerOrder().getAddress() is better captured in local variable.