use of inheritance

Prepare an abstract class, implement part of the logic in the form of a specific method and a specific constructor, and then declare some abstract methods to force the subclass to implement the remaining logic. Different sub-classes can implement

I. Basic Concepts There is no difference in thinking between the world of programs and the "object" World of mankind. The rich generation inherits from its parents and naturally owns all the resources of its parents, subclass inherits the parent

Contents of strategy pattern: Concept; composition; Application Scenario; meaning; implementation; writing steps; advantages and disadvantages; simple implementation. Concept: The Strategy Pattern Defines a family of algorithms, encapsulates each

Definition Modifier mode: dynamically attaches the responsibility to the object. To expand the function, the modifier provides an alternative solution that is more flexible than inheritance. The decorator mode is more flexible than the subclass

  Decorator mode: In the process of object-oriented design and development, you may often encounter the following situations. We need to add new responsibilities for a defined class, in this case, we will define a new class to inherit the custom

Introduction to Standard C ++ development and programming practices Standard C ++ introduction to development and programming practices prepares the second edition. Please provide suggestions! What aspects do you want to focus on? 1st articles C ++

Original: http://blog.csdn.net/weiwenhp/article/details/8455471The habit of ThinkingPeople who are used to C have to look at a program first to find out where the main function is, and then look down. Because the main function acts as the entry

Inheritance is a double-edged sword.Through the previous sections, we should have a better understanding of inheritance, but before we say that inheritance is actually a double-edged sword, why do you say so? On the one hand, inheritance is very

Seven principles: Open and close principle, Richter substitution principle, dependency reversal principle, synthesis/aggregation multiplexing principle, Dimitri rule, interface isolation principle, single duty principle.The open and closed principle

The synthetic multiplexing principle, also known as the combinatorial/aggregation multiplexing principle (composition/aggregate reuse Principle, CARP), is defined as follows: Synthetic multiplexing principles (Composite reuse

When drawing a class diagram, it is important to clarify the relationship between classes and classes. The relationships of a class are generalized (generalization), implemented (realization), dependent (Dependency), and associative (association).

PHP design pattern-rule pattern statement: This series of blog reference material "big talk design pattern", author Cheng Jie. Policy patterns define a series of algorithms, encapsulate each algorithm, and make them replaceable. The policy mode

Php design mode-concept of policy mode and policy mode Policy patterns define a series of algorithms, encapsulate each algorithm, and make them replaceable. The rule mode allows algorithms to change independently of customers who use it.

"Decorator", also known as "Wrapper )",It is usually used to flexibly expand object functions..Before that, we can extend the function of the parent class through class inheritance. However, this inheritance method lacks flexibility and will quickly

There is nothing mysterious about software design. As long as you understand it with your heart, everything is actually quite natural. The "path" of software design lies in its simplicity and naturalness, not in its design. I. Layers of Software

Understanding about Connection   The development in iOS SDK is similar to the Dialog Based Application development in Windows. It is to drag some page elements to the window and then write the corresponding code. However, why is no Connection

24-day design model-strategy model, 24-day Design Model Original works of Lin bingwen Evankaka. Reprinted please indicate the source http://blog.csdn.net/evankakaI. Stragegy Pattern 1. Introduction The Strategy Mode is also called the rule mode. It

"OC" inheritance, "oc 」I. Basic usage1. design two types of Bird and Dog 1 // Bird Declaration 2 @ interface Bird: NSObject 3 {4 @ public 5 int weight; 6} 7-(void) eat; 8 @ end 9 // definition of Bird 10 @ implementation Bird11-(void) eat {12 NSLog (

Inheritance is one of the three main features of OOP. This section focuses on the inheritance notes. 1. Concept and use of Inheritance In Java, inheritance can simplify the definition of classes and extend the functions of classes. JAVA supports

AOP (Aspect-Oriented Programming) can be said to be a supplement and improvement of OOP (object-oriented programing, object-oriented programming. Oop introduces concepts such as encapsulation, inheritance, and Polymorphism to establish an object