How does creating an instance of the Object class determine the allocated memory space?

When creating an instance of the Object class in Java, memory is allocated on the heap. The JVM allocates a block of memory sufficient to store all the fields of the object, including metadata such as the class pointer and instance data. The size of the allocated memory depends on the class structure and JVM, but for Object, it is minimal since it has no additional fields.

The process roughly looks like this:

1. The new Object() operator is called.
2. The JVM allocates memory on the heap for the object.
3. The object's metadata is initialized.
4. A reference to the created object is returned.

Object obj = new Object();

Thus, memory is allocated dynamically on the heap, and the size depends on the internal structure of the object and the JVM.