Java

I used to see the word "callback method (or callback function)", but I didn't know what it meant, and I didn't understand how to use it. Now from the network to collect some good information, and then tidy up, as their own notes, also as a learning

Before learning C #, is completely in the work of learning, some of the bottom of the more in-depth truth is not very clear. Now that you have learned Java, it is confusing to pass a value to a Java parameter, not a reference (pointer), not often in

The following is an example of the jdk1.8.0_05 version:1. Add variable name in user variable: Java_home variable Value: D:\Java\jdk1.8.0_05 (based on instance path transformation)2. Add variable name in user variable: CLASSPATH variable value:.;

This year I have been thinking about the problem of the separation of the front and back of web development, and now there is a lot of snacks, with this problem in depth, and now the company many Web project control layer of the technical framework

Company Business needsGame 2D model has a circle and a rectangle, judging the collision is the detection: 1. Whether the circle is intersecting with the Circle 2. Whether the circle intersects with the rectangle3. Whether the rectangle and rectangle

Object-oriented design, the focus of taking should actually be the abstraction layer of reuse, rather than a specific code block reuse.When it comes to abstraction, I have to mention Java interfaces and Java abstract classes, which is the point I

The first kind: The original ecological running jar package1, using Eclipse to write Map-reduce method, generally introduce Hadoop-core-1.1.2.jar. Note that there is no plugin for Hadoop installed here in Eclipse, just introducing its turn packet,

Brief introductionSome concrete applications of abstract classes in object-oriented theory have been said. Today I'm talking about another key thing in object-oriented theory. Interface. Abstract classes are classes, and interfaces are special

AES symmetric encryption and decryption

Java Implementation BASE64 codecChszs, reprint need to indicate. Blog home:Http://blog.csdn.net/chszsBASE64 and other similar coding algorithms are often used to convert binary data into textual data, which is intended to simplify storage or

Converting a common Java project into a MAVEN project is not a very big task, it only takes the following steps to make the conversion successful. Here I use a simple selenium test small demon as an example. Move all associated libraries in

Content transferred from: http://www.blogjava.net/orangelizq/archive/2007/10/17/153573.htmlNow clone is not a fresh word, along with the "Dolly" the word is really "fire" over a while, in Java also has such a concept, it can make it very convenient

"Editor's note" Java is almost an introductory language for many programmers, and is also a popular programming language in the world. Andreas Kull, a foreign programmer, has compiled a very good Java development resource on GitHub and recommended

Associating a method call with the same method body is called a binding. Binding (implemented by compilers and connectors) prior to program execution is called early binding . The reader may never have heard of the term because it does not need to

/*** TCP: Transmission Control Protocol, the use of three-way handshake to ensure accurate connection operation. * UDP: Datagram protocol, send datagram, for example: SMS or QQ message. *//*** TCP server-side programs*/ Public classMain { Public

Reader-writer problem (Readers-writers problem) is also a classic concurrent programming problem, which is often a synchronization problem. Data (Files, records) in a computer system are often shared by multiple processes, but some of these

The last time we mentioned that not using the Left-loin Association query, it might be to improve efficiency or to configure caching, or to simplify the writing of SQL statements. Just write a single-table query, SQL is really too simple. The

ParNew collector for JAVA garbage collector, parnew for garbage collection 1, Features The ParNew collector is a type of Garbage Collector in Java virtual machines. It is a multi-threaded version of the Serial collector. In addition to using

Java basics --- reflection mechanism, java basics ---1. Is java a Dynamic Language? Generally speaking, dynamic language means that the program structure or variable type can be changed while the program is running. From this point of view, JAVA and

Serialization principles from Hadoop Writable serialization framework to java After the previous module, the analysis content comes to the Hadoop IO-related module. The module of the IO system is a relatively large module, In the Hadoop Common io,