X86 protected mode eight operating system instructions Typically used in operating system code, these instructions do not apply in applications Instructions are divided into three types: real mode instructions, instructions used under any power level, instructions executable under real mode power level 0, and instructions executed only in protected mode 1. Instructions executable in real […]
Tag: protected
JavaSE [inheritance and polymorphism] (1) (focus: initialization, protected encapsulation, combination)
1. Inheritance Inherit (inheritance) Mechanism : It is the most important method for object-oriented programming to make code reusable. It allows programmers to extend and add new functions on the basis of maintaining the original class characteristics. , thus creating a new class, called Derived class . Inheritance presents the hierarchical structure of object-oriented programming, […]
<Java> Access restriction modifier private, protected, public and default scope comparison
Directory 1. Introduction 2. Code proves the scope of the access restriction modifier 1. Same package 2. Different types of the same package 3. Different types of buns 4. Different packages are not subclasses 3. Summarize the scope of access restriction modifiers 1. Introduction default: By default, class does not add any modifiers, also known […]
The access scope of c++ class members is public private protected
Access Modifiers in C++ – GeeksforGeeks Protected access modifier is similar to that of private access modifiers, The difference is that the class member declared as Protected are inaccessible outside the class but they can be accessed by any subclass(derived class) of that class. Example: // C++ program to demonstrate // protected access modifier #include […]
From C to Cpp – Sixteen, class inheritance (2) virtual method and protected access control
1. Class pointers and class references In the inclusive Cpp world, references to classes and pointers to classes certainly exist! For example, I designed the following class: #include <iostream> class Student { private: int age; int grade; public: void set(int p_age, int p_grade) { age=p_age; grade=p_grade; } Student(int p_age=19,int p_grade=1) { age=p_age; grade=p_grade; } }; […]
Handwritten Operating System–The Beginning of Entering Protected Mode
The main boot sector and kernel loader we talked about before. All run in real mode. The addressing range in real mode is only 1M, which is far from enough for us. If we want a larger memory space, we have to enter the protected mode. The real mode is a historical problem, and it […]
Inheritance of Visual C++ classes and access characteristics of members in classes – understand public, protected, private
I am Liyuan Breeze. As a veteran in the IT industry for 25 years, today I will talk about the inheritance of classes in Visual C ++ and the access characteristics of members in classes, that is, to understand the public, protected, and private. something. Many people do not understand these three things, and it […]
[JavaSE] Inheritance (accessing parent class member variables in subclasses, accessing parent class member methods in subclasses, super keyword, subclass construction method super and this, and then talking about initialization protected keywords, final keywords, inheritance and combination)
Article directory inherit why inheritance is needed parent class member access Accessing parent class member variables in subclasses Subclass and parent class member variables have the same name Access parent class member method in subclass Member method names are different Member methods with the same name super keyword subclass constructor super and this Let’s talk […]
[C++] Inheritance and polymorphism, public, private, protected, rewriting
Distinguish between inheritance and polymorphism, public, protected, private The concept of inheritance and polymorphism The difference and connection between inheritance and polymorphism the difference: connect: example result: Inherited and Accessed Permissions illustrate Example: result in conclusion The concept of inheritance and polymorphism Three principles of object-oriented: encapsulation, inheritance, polymorphism. Inheritance is a mechanism by which […]
The protected modifier of Java access rights
Summary In Java, use access modifiers to protect access to classes, variables, methods, and constructors. Such modifiers are public, protected, default, and private, respectively. Since the introduction of protected visibility in many Java books is relatively general, this article focuses on the protected permissions 1. Java permission access modifier The permissions of each access modifier […]