solid principles java

Object-Oriented design principles:Is the core of programming for Oops (object-oriented programming System, Object-oriented program design systems), but most Java programmers chase design patterns like Singleton, Decorator, and Observer, Rather than focusing on object-oriented analysis and design. Even experienced Java programmers have not heard of oops and solid

The object-oriented design principle is the core of OOPS (object-oriented programming system) programming.Design patterns such as Singleton, decorator, and observer do not focus on Object-Oriented Analysis and Design. There are even experiencedJava programmers have never heard of OOPS and solid design principles. They do not know the benefits of design principles

1.DRY (Don't repeat yourself)This means not writing duplicate code, instead of using abstract commonalities. If you use hard-coded more than once, consider exposing it as a final-modified invariant, and if you have the same block of code in more than two places, consider making it a separate method. The benefits of solid design principles are in maintenance. It is important to note that repetition does not

collection process are explained.The five articles will explain the principles of Java Program Performance tuning, especially the necessary knowledge in this process and the need to determine whether your program needs tuning. It also describes the problems you may encounter during tuning. At the end of this article, I'll give you some advice on how to make better decisions when tuning

As we all know, exceptions in Java provide a consistent mechanism for identifying and responding to error situations, and effective exception handling can make programs more robust and easy to debug. An exception is a powerful debugging tool that answers the following three questions:1. What went wrong?2. Where's the mistake?3. Why did it go wrong?In the case of a valid use exception, the exception type answers "What" is thrown, the exception stack tr

mapped to native threads, so thread scheduling ultimately depends on the operating system, although many operating systems now offer priority concepts, but do not necessarily correspond to priority one by one for Java threads. For example, there are only 7 thread priorities in Windows, while the Java language sets a total of 10 levels of thread priority. State Conversion of

Java transactions: Principles and Applications of Java transactions 1. What is a JAVA transaction? Generally, transactions are only related to databases. Transactions must follow the ACID principles established by ISO/IEC. ACID is short for atomicity, consistency, isolation

Java cross-platform principles and java First, briefly explain the features of Java cross-platform, it is equivalent to writing a Java program that can run on different operating system platforms (Here we simply regard the platform as an operating system platform ). Here ar

Java annotation and java annotation principles Package com. ann. test; import java. lang. annotation. documented; import java. lang. annotation. elementType; import java. lang. annotation. inherited; import

In-depth analysis of java thread pool implementation principles, in-depth analysis of java Thread Pool Preface A thread is a scarce resource. If it is created without limit, it will not only consume system resources, but also reduce system stability. It is reasonable to use the thread pool to uniformly allocate, optimize, and monitor threads, benefits: 1. reduce

As we all know, the basic principle of Java programming is to pursue high-cohesion and low-coupling solutions and code module design. Viewing the open source code of Apache and Sun can help you discover the practical use of other Java design principles in these codes. The Java Development Kit follows the following patt

One, what is Java transaction The usual idea is that transactions are only relevant to the database. Transactions must conform to the acid principles set out in ISO/IEC. Acid is an abbreviation for atomicity (atomicity), consistency (consistency), isolation (isolation), and persistence (durability). The atomicity of a transaction indicates that any failure in the execution of a transaction will invalidate

Web and network basics, HTTP packets, working principles, HTTP Communication Technology in Java, java Communication Technology I. web and network Basics 1. HTTP history 1.1 concept of HTTP: HTTP (Hyper Text Transfer Protocol) is a communication Protocol that allows the Transfer of Hypertext Markup Language (HTML) documents from a Web server to a client browser.

Deep understanding of JAVA polymorphism principles and deep understanding of java Polymorphism I have always known what polymorphism is, and I often use polymorphism when coding, but I have never really understood what the underlying operating mechanism of polymorphism is like, write it down specially, and make progress together with all of you. I also hope you c

Seven major design principles:1. Single Duty principle: one class is responsible for a duty.2, the Richter replacement principle: Subclasses can extend the function of the parent class, but cannot change the original function of the parent class.3, dependency inversion principle: The high-level module should not rely on the lower layer module, both should rely on its abstraction; abstraction should not depend on detail; detail should depend on abstrac

the six principles, is the author's own personal sentiment, if there is a fallacy, welcome to point out. If you are interested in in-depth understanding, you can refer to the Java and mode has other excellent online blog,Ignition NULLSource: http://www.cnblogs.com/lightnull/This article for the ignition null original, welcome reprint, but without consent must retain this paragraph statement, and in the art

fileV2 =NewFile ("Helloworld.class"); -File fileV1 =NewFile ( -"Bin\\com\\csair\\soc\\hotswap\\helloworld.class" ); theFilev1.delete ();//Remove V1 version -Filev2.renameto (fileV1);//Update V2 version -System. Out.println ("Update success!"); - Loadhelloworld (); + } - + Public Static voidLoadhelloworld ()throwsException { AMyclassloader Myloader =NewMyclassloader ();//Custom class Loaders atclassMyloader -. Findclass ("Com.csair.soc.hotswap.HelloWorld");//class Instance -Object ob

(To) http://www.blogjava.net/BlueDavy/archive/2008/03/04/182077.html In the distributed service framework, the most basic problem is how remote services communicate. In the Java field, there are many technologies that can implement remote communication, such: RMI, Mina, ESB, burlap, Hessian, soap, EJB, and JMS. What is the relationship between these terms? What is the principle behind them, understanding these is the basic knowledge for implementing