Thinking in Java 16/3/5

interfaces : Functions of classes

Light LT = New Light ();

Lt.on ();

Hidden : How a class member/interface function exists (in the way it is used)

Public

Private

Protected

The difference between reuse and inheritance

multiplexing : Automotive Containment Engine (A contains B)

inheritance : Cats are animals (base class and export Class)

Extends and coverage (overriding) concept

extends inheritance : Add function (original function automatically exists)

overrding: Rewrite, different functions of the same interface

Thinking: The difference between exporting classes with or without overrides

A. A circle is a geometric shape (subclass)

B. e-books like paper books (instead)

Thinking: When there are two classes that intersect, is it necessary to inherit or completely replace, to generate a new class

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differences between Java and C + + :

single-Root inheritance : Are all classes inherited from a single base class?

objects can only be created in one way :(on the heap) new dynamically created

Containers: Containers that store objects (objects are references)

Concurrent Programming : Perform a task at the same time

Multi-Threading and locking

lock : Avoid problems with shared resources (two threads trigger printer at the same time)

Java concurrency is placed in the language

Thinking in Java 16/3/5