Java Programming Ideas Learning notes

I. Introduction to Objects

Access rights in 1.Java: Public,protected,private and Default: The default access rights are package access, under which classes can access other class members in the same package. But outside of the package, it's like private.

The ultimate class in 2.Java is: Object

Second, everything is the object

Places stored in 1.Java: (1) Register: Fastest Storage area

(2) Stack: In general RAM. If the stack pointer moves down, the new memory is allocated, and if the stack pointer is understandable, the corresponding memory is freed.

(3) Heap: A common memory pool located in RAM for storing all Java objects.

(4) Constant storage: stored directly inside the program code.

(5) Non-RAM storage: Provides support for lightweight persistence

2.

Java Programming Ideas Learning notes