java coding best practices

Introduction Over the last decade or so, people have written a lot about Java™platform, Enterprise Edition (Java EE) best practices. There are now more than 10 books and hundreds (perhaps more) of articles that provide insights into how Java EE applications should be written. In fact, there are so many references in t

has been trying to figure out the coding problem in Java, but also read some articles on the internet, but still foggy. It was not until recently that I saw Fanglixun's web course that I understood a little.Keep a record of your understanding and see if you can be clear about it. The first question: I define a string in Java code, what is it encoded?

. I have searched for this option Java official documentation. But I can ' t find it.How does the open a jar file on a Mac?You can indeed launch a jar file from the command line, with the following command:Java-jar Yourfile.jarAs well as the default app for this can assign "Jar Launcher" as the. Double-click a jar file, as follows (I don t believe you need the developer tools installed for this):Click once on the. jar file in the Finder and then from

Please contact me if you have any questions :) Coding FAQ (PL/SQL and Java)1. the PL/SQL data type is incorrect. For example, aac001 is of the varchar2 type, but it is not included in ''. Although the program can be queried, it poses a hidden risk for future performance problems.Select aac002 from ac01 where aac001 = 123456;Select aac002 from ac01 where aac001 = '000000 ';2. The code is too long.No matter i

Chinese characters use three bytes. Note that although UTF is used to use less space, it is only relative to Unicode encoding, and using GB2312/GBK is undoubtedly the most economical if it is already known to be Chinese. On the other hand, it is worth noting that although the UTF encoding uses 3 bytes for Chinese characters, even for Chinese-language web pages, UTF encoding is more economical than Unicode encoding, because the Web page contains a lot of English characters. Second,

Java is Google's coding style guide... this is awesome. We will provide you with a pdf version of the first version. If you have money, please buy the second version of the genuine version. There are also several Java-related coding styles that actually come from Google for reference:The encoding style recommended by

Source: http://java.sun.com/docs/codeconv/html/CodeConvTOC.doc.html,Http://morningspace.51.net/,moyingzz@etang.com. 1 Introduction (Introduction)1.1 Why coding standards (Why Have Code Conventions)Coding standards are especially important for programmers for the following reasons:-80% of the cost for a software life cycle is maintenance.-Almost no software is maintained by the original developer throughout

Coding | Problems Java language default encoding is Unicode, and we Chinese commonly used files and databases are based on GB2312 or BIG5 encoding, how to properly select the encoding method and correctly handle the Chinese character encoding? This article will start with encoding common sense, combine Java programming example, analyze above two questions and pro

traditional database in high concurrency under the shortcomings;3) Application Architecture optimizationIntroduce some new computing or storage framework, use the new features to solve the original cluster computing performance bottleneck, or introduce a distributed strategy to level the computation and storage, including pre-calculation preprocessing, and so on, take advantage of typical space time-changing practices, etc., can reduce the system loa

", "C", "D", "E"}); 7. Put the supplied array elements into a string // containing the provided list of elements // Apache Common lang String j = stringutils.join (new string[] {"A", "B", "C"}, ","); System.out.println (j); // A, B, C 8. Converting an array list to arrays String[] Stringarray = {"A", "B", "C", "D", "E" }; ArrayListNew arraylist(arrays.aslist (Stringarray)); New string[arraylist.size ()]; Arraylist.toarray (Stringarr); for (Str

Java provides a set of APIs to support the interaction between threads. A set of APIs waiting to be notified in the object classWait ()Notify ()Notifyall ()It is important to note that you must never call the Wait () method outside of the loop. (Open a separate article to discuss) The following uses consumer and producer issues to demonstrate the use of the above API:Packagexiancheng;publicclasspc{publicstaticvoidmain (String[] args) {shareds=newshare

data. The data mentioned here include: run log , exception stack, GC log, thread snapshot (threaddump/javacore file), heap dump Snapshot (heapdump/hprof file), and so on . Frequent use of appropriate virtual machine monitoring and analysis tools can accelerate our ability to analyze data and pinpoint problem resolution. Fifth chapter: Tuning case analysis and actual combat Sixth chapter: Class file Structure seventh Chapter: Virtual machine Load Class mechanism eighth chapter: Virtual machine B

, then how to decode Java?We know that there are two classes in the Java-side processing URL codec, namely Java.net.URLEncoder and Java.net.URLDecoder. These two classes can decode all "%" plus UTF-8 code values with UTF-8 to get the original characters. View the source code of Urlencoder you can find that Urlencoder protected special characters less than the special characters protected in JS.

Mom no longer worries about my coding. Integration of Chinese encoding, windows, django, python, java, html, djangopythonUse django to write a small web application. This application calls a business-related jar package and displays the returned values of the jar package. In windows, the django framework is used to call the java jar package in python and output t

Java vs. Unicode:Java's class file is encoded in UTF8, and the JVM runs with UTF16.The Java string is Unicode-encoded.In summary, Java uses the Unicode character set to make it easy to internationalize.Which character sets are supported by Java:Which character sets can Java recognize and handle correctly?View the CharS

Chinese character "strict ". You can query a specific symbol table at unicode.org or a special Chinese character table.3. UTF-8 With the popularity of the Internet, a unified encoding method is strongly required. UTF-8 is the most widely used Unicode implementation method on the Internet. Other implementations also include UTF-16 and UTF-32, but are basically not needed on the Internet. Repeat, the relationship here is that UTF-8 is one of the Unicode implementation methods.The biggest feature

JAVA advanced: 12 most important J2EE best practices-general Linux technology-Linux programming and kernel information. For more information, see below. Best practices 1. Always use the MVC framework. 2. apply automatic unit testing and test management at each layer. 3. develop according to the specifications, rather than the application server. 4. Plan to use J

Java coding UTF-8, ISO-8859-1, GBK Java support UTF-8, ISO-8859-1, GBK and other font encoding, the author found that the problem of font encoding in Java is still difficult to fall a lot of programmers, although there are many articles on how to correctly display Chinese Characters in

Java Application Performance optimization is a commonplace topic, the author based on personal experience, the Java performance optimization is divided into 4 levels: Application layer, database layer, framework layer, JVM layer. Through the introduction of Java performance diagnostic tools and ideas, to give the Sogou business Platform Performance optimization c

Causes of Java coding and Solutions I. file encoding Unicode is the preferred encoding. Unicode is a global character encoding standard. Conclusion: the conversion between GBK and unicode is performed through the gbk unicode ing table. The conversion between UTF-8 and unicode is based on the Conversion rule Formula Therefore, unicode is the core intermediary. To convert Gbk to UTF-8, convert it to unicode