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

There may be some performance overhead of calling the getAge() method many many times, but I suggest you consider The Sad Tragedy of Micro-Optimization Theater.