Java

I first contact Java, the understanding of Java is not comprehensive enough, now can only use the basic knowledge of Java to do a small programming game-guessing game!The game is a rule: set a randomly generated secret value between 1-100, and then

Reference:1, 11900000086591082, Https://docs.sonarqube.org/display/DEV/Adding+Coding+Rules3, Https://docs.sonarqube.org/display/DEV/Adding+Coding+Rules+using+Java4, https://docs.sonarqube.org/display/PLUG/Writing+Custom+Java+Rules+101There are two

1. Why rewrite the Clone () method?The shallow copy in Java does not re-create a new reference space for the object that you want to copy, and we'll rewrite the Clone () method when we need a deep copy.2. Example of the Equals () and Clone () method

abstract class: AbstractionAbstract: Not specific, can not understand. Abstract class representation manifests itself. in the continuous extraction process, the common content of the method declaration extraction, but the method is not the same, no

In the process of configuring the Java EE development environment encountered a lot of problems, in this system to tidy up my previous configuration processNote: The configuration process is learned from the Jsp&servlet study notes (second Edition)

Because of the common principles of Java and C + + object-oriented programming, so this time to summarize the relevant points separately, this article mainly summarizes the Java object-oriented programming.The three main features of object-oriented

Aqs's design idea is to provide a template through inheritance that allows you to easily implement a personalized synchronizer based on different scenarios. The core of Synchronizer is to manage a shared state, which can implement different locking

1 //: Makedirectories.java2 PackageC10;3 4 ImportJava.io.File;5 ImportJava.text.SimpleDateFormat;6 Importjava.util.Date;7 8 /**9 * @time: Afternoon 7:59:23Ten * @date: April 29, 2017 One * @auther: Skyfffire A * @version: v0.1 - */ - Public

The field in Java.math declared as BigInteger is static BigInteger BigInteger. The one BigInteger constant 1. Static BigInteger BigInteger. TEN BigInteger's constant 10. Static BigInteger BigInteger. The constant of ZERO BigInteger 0.Returns the

The main content of this chapter is how to share and publish objects, so that they can be safely accessed by multiple threads simultaneously.The visibility of memoryMake sure that when a thread modifies the state of an object, other threads can see

ChingOriginal address: http://blog.csdn.net/qingdujun/article/details/41154807This article company explains FileWriter, FileReader, Bufferwriter, Bufferreader, Linenumreader, FileOutputStream, FileInputStream, Bufferinputstream, Bufferoutputstream

Polymorphism brings up the problem of how to determine the type of object that a variable actually refers to. C + + uses Runtime-type information (RTTI), and Java uses instanceof operators.The instanceof operator is used to determine the actual type

I. Introduction to MVC　　The MVC (Model-view-controller) Model-View-controller, first proposed by Trygve Reenskaug in 1978, is the Xerox Palo Alto Research Center (Xerox PARC) a software architecture invented in the 1980s for the programming language

1, the principle of hashingThe occurrence of a hash is due to a traditional data structure such as a linear table (array, linked list, etc.) in the tree. There is no corresponding relationship between the keyword and other storage locations.

Factory method ModeReturn to the design mode catalogRead the catalogue: Simple Factory mode Introduced UML Class Diagram Reference Code Summarize Factory method Mode Introduced UML

The last blog explains the nine internal sorting algorithm, some of the algorithm also provides code implementation, but those code implementation is based on the array to sort, this blog on the list of links to implement several common sorting

In Web projects, drop-down boxes, jquery, and Ajax can be used to implement a pull-down box linkage query.For example, when you inquire about a place, the page is: Province: City: County: Street: queryFor example, you chose the province: Jiangsu

JAVA learning notes-Introduction to several common keywords static, final, this, super, learning notes static I. static Static (static) can be placed before classes, methods, and fields. Generally, when a class is created, the class's appearance and

The most comprehensive Spring learning notes and spring learning notes Spring is committed to providing a way to manage your business objects. Spring can be seen everywhere in a large number of Java EE applications. Today, I will briefly introduce

Struts1 implements simple login (with source code) and struts1 source code Environment: MyEclipse 14 Release Date: 21:04:551. struts1 framework construction In MyEclipse, create a web project named struts1_login. If this is an empty document,