Is memory allocated for unused fields in Java?

I want to know how memory allocation works in Java

I have a class duck with two instance variables int size and string name These variables are initialized If I do not instantiate this class, is the memory of these variables allocated on the heap at runtime?

Thank you, gene

Solution

Several possible situations:

>If you are not in class, the class itself is not loaded into the class loader. > If you are using the course, but not instantiating it, then the instance variable does not occupy memory because there is no instance to start. > If you are using a course and use the object class as its instance, then the instance variable uses memory for each instance, whether you use these values or not