Calling a getter multiple times or calling once and assigning to a variable?

Question

say suppose I have class as :

public class Age {

    private int age;

    public int getAge() {
       return this.age;
    }

}

In my Main c

Answer 1

Don't bother. It's absolutely not worth micro-optimizing like this. Wait until you finish your code, then it runs too slowly, then get out a profiler and work on what the profiler tells you is the source of the problem.

Premature optimization is the root of all evil.