java coding basics

In this article, we discuss 13 different static exposure techniques. For each type of exposure, we explain the impact of not dealing with these security issues. We also recommend some rules for you to develop robust and secure Java applications that are not threatened by these static security exposures. When appropriate, we provide code samples (both exposed code and exposed code ). Techniques for dealing with High severity exposuresFollow the follow

multi-threading best practice, but it's double edge sword at same time. Lock interface is powerful but every power comes with responsibility. Different locks for Read and write operation allows to build scalable data structures like Concurrenthashmap, but it also Require lot of care during coding. Unlike synchronized keyword, thread doesn ' t release lock automatically. You need to call unlock () method to release a lock and the best practice are to

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

"); System.out.println (Sunicode);//6, GBK encoded string SGBK = new String (BYTESGBK, "GBK"); System.out.println (SGBK);//If the restore by other encoding, there is garbled//1, UTF-16 encoding decoding UTF8 generated bytes string Sutf16erro = new String (Bytesdefault, "UTF16"); System.out.println (Sutf16erro);//2, decoding UTF8 bytes generated with unicode encoding string sunicodeerror = new String (Bytesdefault, "Unicode"); System.out.println (sunicodeerror);//3, decoding UTF8 generated bytes

, 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.

100 times the latter, but it does use the same number of digits in the binary. Can do better, the method is variable length coding, the guiding principle is high frequency with a shorter number of digits encoded, low frequency with a longer digit code. Huffman coding algorithm is to deal with such problems. Huffman coded Java implementation The main data struc

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

. 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 and JavaScript Base64 encoding When developing Java Web applications, it is possible to use Java for BASE64 encoding on the server side, while the client can decode it with JavaScript. This requires consistency of Base64 coding mechanisms on both sides. Using BASE64 encoding, you may encounte

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

Java coding specification (1)-General Linux technology-Linux programming and kernel information. For details, see the following section. 2. File Names) This section lists common file names and their suffixes. 2.1 File suffix (File Suffixes) Java programs use the following file suffixes: File category file suffix Java s

Often encountered in the work of Java coding problems, due to lack of research, always can not give the exact answer, this weekend on the Internet to check some information, here to do some summary.The first thing we need to know is:(1) In the computer disk storage is a byte, the network is also transmitted bytes;(2) The so-called encoding, refers to the characters encoded into a specific encoding format of

Write a small web app with Django. A business-related jar package called in the application and displays the return value of the jar package. It is in the Windows environment, using the Django framework, the Python language to call the Java jar package, output content into, HTML. involves a bunch of coding problems.the process is not garbled, is garbled. Finally in the expert guidance under the fix. Hereby

Xiaokang will accompany you to learn JAVA---JAVA basics and java Basics This article is a small Summary of JAVA. 1. There are three ways to annotate Java: (1) start with the "//" Mark u

{//ensure the arrays is of equal size ...}9) ToString methodIn general, each class should define a ToString method:Public String toString () {...}) Main methodGeneral class, consider placing a main () method that contains the code used to test the class, and if it contains the main () method, it should be written at the bottom of the class.4. Java Coding Other ConventionsN DocumentationYou must use Javadoc

Recommended 2 tool classes that can reduce the amount of code and are easy to use during coding: for Java reflection and single-measurement assert.1 Introduction to Mirror:java ReflectionOfficial website: http://projetos.vidageek.net/mirror/mirror/Simplify the command-oriented syntax provided by the Java Native API: Class.getfield/getdeclaredfields/getmethod ()/g