interface or abstract class

20135101 Cao Yujing Experimental content 1. Preliminary knowledge of unit testing and TDD2. Understand and master the object-oriented three elements: encapsulation, inheritance, polymorphism 3. Initial mastery of UML modeling 4. Familiar with the

First, prefaceThe inner class is also called a parasitic class, which is to put a class inside a class (that is, the upper-level program unit of the inner class is the class) definition, as a member of the outer class. Inner classes are mainly

Context (Application scenario):1, need to use the algorithm provided by Concretestrategy.2, internal maintenance of a strategy instance.3, responsible for the dynamic setting execution strategy detailed implementation algorithm.4, responsible for

1. ExampleScene One: Xiao Ming wrote a task performer, the performer of the execution of a number of tasks, in the network after a period of time, found that there is a probability of some failures, found that after a period of time, the task of

In class files, field tables, method tables, you can bring your own collection of property sheets to describe the information that is proprietary to certain scenarios. Unlike the order, length, and content requirements of other data items in the

Abstract: Original creation Place: http://www.cnblogs.com/Alandre/sediment brick slurry Carpenter hope reprint, keep abstract, thank you! PrefaceVisual inspection for a long time did not write articles, distance from the previous article also has

1. Definition Policy mode: Defines a set of algorithms that encapsulate each algorithm so that they can be replaced with each other. The policy pattern allows the algorithm to change independently of the client that calls it. The policy

Composite definition: Organize objects in a tree-shaped structure to achieve a "partial-overall" hierarchy, making the client consistent with the use of individual objects and composite objects. Composite is easier to understand, think of composite

Many friends ask me to learn Java there is no shortcut, I said " No, absolutely not! "". But I am willing to learn some of their experience to write out, so that later people less detours, help others is the greatest joy! To learn Java well, you

Abstract Factory mode (Abstact Factory) is a common software design pattern. This pattern provides a unified creation interface for a product family. When you need a series of this product family, you can create a specific factory class for this

Abstract Factory mode (Abstact Factory) is a common software design pattern. This pattern provides a unified creation interface for a product family. When you need a series of this product family, you can create a specific factory class for this

forwarding Please indicate the source: http://blog.csdn.net/qq_28055429/article/details/51507170 One, single responsibility principle: in the case of a class, there should be only one reason for its change (that is, the implementation class should

definition: dynamically adds some additional responsibilities to an object. Decorator mode is more flexible than generating subclasses in terms of adding functionality. Type: Object-structured pattern alias : Packing mode (wrapper) class

Http://www.cnblogs.com/leoo2sk/archive/2008/04/10/1146447.html I think, for everyone using object-oriented programming language programmers, the term "interface" is certainly not unfamiliar, but I do not know whether you have such a doubt: what the

I. Definition Decorative mode (decorator pattern) is a more common pattern, defined as follows: Dynamically adding some additional responsibilities to an object. Decorative mode is more flexible than generating subclasses in terms of adding

One, Value object mode Again, before the design pattern-the value object pattern-you have to understand value passing and reference passing: 1. Value Object Pattern Concept:If you assign the same object resource to two different variables and then

author :peterxu source : Blog.csdn blog:http://blog.111cn.net/peterreg/Copyright Notice : Original works, allow reprint, reprint, please be sure to hyperlink form to indicate the original publication of the article, the author's information and this

To correctly use state and policy patterns in Java applications, developers need to be aware of the differences between the two patterns. Although the structure of the state and policy patterns is very similar, they also follow the open and closed

I. Patterns of behavior Behavior patterns are concerned with the behavior of objects. What this type of pattern needs to do is to abstract the behavior that is likely to change, by encapsulating the scalability of the entire architecture. A policy

Purpose of this section: Specific: Access control permissions: Previously learned three access control permissions: Private, default, public private: You can define methods, properties, defined methods and properties that cannot be seen by the