Where in the JVM is a primitive field of an object located: in the Heap or Stack memory area?

In JVM, primitive fields of an object are located in the Heap memory area because they are part of the object. Objects in Java are always placed in the heap, including all their fields — both primitive and reference types.

The Stack is used for storing local variables of methods and function calls, but not for object fields. Therefore, when an object is created, its primitive fields are stored inside the object in the heap.

For example, if you have a class:

class MyClass {
    int number; // primitive field
    String text; // reference field
}

When an instance of MyClass is created, memory will be allocated in the heap for the entire object, including the number field.