interface keyword

PHP interface has been controversial from beginning to finish, some people say interface is very good, some people say interface like chicken. The first thing to understand is that good drinking is not the standard of judgment. Undoubtedly, this is

Conclusion: Polymorphism is the core of object-oriented.---------can be understood as a method, a variety of implementations,It is possible to use virtual methods, abstract classes, and interfaces to achieve polymorphic 1. First use the

Since Friday I had some things not enough time to summarize the knowledge of the day, so today summarizes the Friday in the cloud and the college learned about commissioned knowledge.Theory:Interface:• Definition of the interface: interface keyword,

C#interface (Interface)The interface defines the syntax contracts that should be followed when all classes inherit an interface. The interface defines the "what" part of the syntax contract, and the derived class defines the "How to" section of the

I. OverviewThe same action acts on different objects, can have different interpretations, and produces different execution results, which is polymorphism.The polymorphism in the component can be implemented in different ways:Interface

1. What is the relationship between interface-oriented programming and object-oriented programming?First, interface-oriented programming and object-oriented programming are not lateral, it is not an independent programming idea that is more advanced

1. Interface interfaceClasses in C # cannot inherit more, meaning that a class cannot inherit from more than one base class at a time. But a class can inherit multiple interfaces, which is a constraint that specifies the functions that the class

definitionWhat is?It is a set of standards, a set of rules, a unified set of requirements for all classes.Do what?It is to achieve multiple inheritance and appear.What do you got?It consists of only two ingredients:1) The static constants of the

Code HostingSummarizing and inheriting the contents of textbook learning• Inheritance: Inheritance basically avoids the repetition of defining common behaviors among multiple classes. What I understand is that in the process of writing a program,

1. The interface must start with I;2. Only declaration, not achieved;3. The implementation of the class in the implementation method, the name must be consistent with the interface;4. Implementation of the class in the implementation of the

Run-time type information allows you to discover and use type information while the program is running.There are two main ways: one is "traditional" RTTI, which assumes that we already know all the types at compile time, and the other is the

Reprinted from: http://blog.csdn.net/mashi321323/article/details/18267719 Login | Registered MASHI321323 's Column catalog view Summary view Subscription October 28 Daniel takes you on a game of

Java interfaceInterface, is an abstract type, is a collection of abstract methods, interfaces are usually declared by interface. A class inherits the abstract method of an interface by inheriting the interface.Interfaces are not classes, and the way

To define a set of method specifications using @protocol in OBJC, the class implementing this protocol must implement the corresponding method. Familiarity with object-oriented child shoes all know that the interface itself is the protocol

Relationships between classes and classes in Java1. Aggregation relationship: Two classes have a low degree of association and can exist separately.2. Combined relationship: Two are relatively high degree of association.How to represent this

The concept of annotationsAnnotations (Annotation), also called metadata (Metadata), are a new feature of Java5, and JDK5 introduces Metadata easily to invoke annotations. Annotations are used in the same hierarchy as classes, interfaces,

1. Category Category①. class is to add a method to a class inside the system or to a class that does not have source code, and cannot add an instance variable② . The added method is referred to as part of the original class, and subclasses can

What is the difference between an interface and an abstract classWhat is the basis of your choice to use interfaces and abstract classes?The concepts of interfaces and abstract classes are different. An interface is an abstraction of an action, and

Abstract class Keywords: abstraction Note: cannot have static modifier interface keyword: interface is used to resolve problems that cannot be multiple inheritance Note: The interface modifier can only be the default or the public interface variable

If you define a class that consists entirely of abstract methods and global constants, this class is called an interface, and the interface is defined using the interface keyword, and the interface has an abstract method, but the interface object