advanced java programming tutorial pdf

. Theoretical basics of conversation and how to implement sessionsSpecification for session implementations in 2.java EE Web applicationsSession: Some file, memory fragment, object, or container managed by a server or Web application that contains various different data assigned to it. The data can be: User name, shopping cart,Workflow details, and so on. There is no need to maintain or maintain any such data in the user's browser.A session between th

JAVA advanced programming: Struts Common Errors Summary-Linux general technology-Linux programming and kernel information, the following is a detailed description. 1. "No bean found under attribute key XXX" An ActionForm is defined in the struts-config.xml, but the class specified by the type property does not exist, a

Information:precommit hook, but can not standardize to the information level, and the submission of information is related to the granularity of the submissioncommit granularity: the part that is more difficult to unify. I'm going to put it in the architecture section.Development habits: A part of self-abandonment. such as TDD, etc.code Cleanliness: Basically can only use code review + PR to standardize. This is related to whether the developer is a livelihood or craftsman mentality, and whethe

block that executes when the class is loaded and executes only once.Publick Class x{}{} is called an instantiation block, and each time an object is generated, an instantiation block is executed, followed by super ().When an object is instantiated and the class contains an instance initialization block, the following events occur sequentially: The corresponding constructor in the subclass is called; To perform a call to Super, the control flow jumps to the corresponding parent clas

the classes and methods that are loaded is in the method Area. The constant pool is filled with objects of the basic type wrapper class such as Integer.Byte.Short. and the string that Appears.Each time the new object is allocated to the object, it is assigned to a header address in the heap memory. Each time you use the method, the memory is opened in the stack memory to use. the pointer and use of the variable in the Method. when the method ends, the stack memory is closed at any Time.The JVM

a URL connection for output, set the DOOUTPUT flag to true, or set to False if you do not intend to use it. The default value is False. 11 Public InputStream getInputStream () throws IOExceptionReturns the input stream of the URL used to read the resource 12 Public OutputStream Getoutputstream () throws IOExceptionReturns the output stream of the URL for writing to the resource. 13 Public URL GetURL ()Returns the URL of the URLConnection

program, as for jnienv* and jclass we generally do not need to touch it. 3) Newstringutf () is a JNI function that creates a new Jstring object from an array of char types containing UTF encoded characters. 4 The above program fragment Jstr=env->newstringutf (str); is written in C + + without using the env pointer. Because the C + + version of the JNIENV function contains a direct insert member function, they are responsible for finding function pointers. For the writing of C, it should read:

class, and the variables that inherit from the parent class are hidden.Method Rewrite principle:1. Must have an inheritance relationship2. The overridden method cannot have more restrictive access rights than the overridden method, which can be the same.3. After rewriting the weight in the method can not be specific to the method to generate more exceptions (exceptions).4. Return value, method name, method must have the same number of arguments as the parent class. (That is, only modify the con

();} catch ( Interruptedexception e) {e.printstacktrace ();} Finally{broadcastsocket.close ();}}} public static float Generatorrandomtrade (int index) {float trade= (float) math.random (), switch (index) {case 0:trade+=118 ; break;case 1:trade+=29;break;case 2:trade+=8;break;case 3:trade+=26;break;case 4:trade+=14;break;default:break;} return trade;} public static Object Now () {SimpleDateFormat df=new SimpleDateFormat ("HH:mm:ss");D ate date=new Date (); return Df.format ( date);}}---------Sto

dept:depts.values()) {System. Out. println (dept + "-" + DEPT.GETNAME_CN () + "-" + dept.getdescription ());}System. Out. println (depts.developdept. getdescription ()); System. Out. println (depts.developdept); }}Test results:We can also participate in abstract methods for enumerations, and then let each enumeration value implement this abstract method. package myenum; public enum depts { finacedept("Finance Department", "responsible for Corporate finance") { void printinfo () {System. Out.

at least the required value attribute target that the terminal can make the URL corresponding to the application like:@ServerEndpoint ("/tictactoe/{gameid}/{username}")If the application is deployed to the address: Http://www.example.org/app, then the server terminal responds with the address: Ws://www.example.org/app/tictactoe/1/andre, ETC., All @onopen, @OnClose, @OnError, and @onmessage methods in the server terminal can then be labeled with an optional additional parameter using only @pathp

Although Java is developed on the basis of C + +, but a lot of C + + defects have improved, one has to mention the string, we know, as learning, into MFC, when dealing with strings or characters, often need to use the _t () macro to convert characters or strings into Unicode type, Otherwise, there will be bugs in the process, and in Java, char or characters stored in the character class, not one byte, but 2

Application Messages12.5 Model for Web applications--attempt-controller mode12.2 Reasons for using the spring framework12.2.1 Logical Code Grouping12.2.2 multiple user interfaces using the same code base12.3 Understanding the application context12.4 Starting the Spring Framework12.4.1 using the deployment descriptor to start spring12.4.2 start the spring programmatically in the initializerServlet mappings for the dispatcher12.5 Configuring the Spring Framework12.5.1 Creating an XML configuratio

JAVA advanced-Network Programming> Connect to the server through a socketSocket refers to Socket> Read the homepage of any website--------- /** * @author Lean @date:2014-10-9 */public class SocketSample {public static void main(String[] args) {BufferedWriter writer=null;Socket socket=null;try {while (true) {try {Thread.sleep(1000);} catch (InterruptedException

classThe Math class provides a number of methods for mathematical operations　　　　The math class is the final class and therefore cannot inherit from the math class　　　　the methods in the math class are static methods, so it is not necessary to create an object of the math class You can use the method of the class directly(i) Constants in the Math classpublic static final Double PIpublic static final Double PI(ii) Common methods in the Math classSeven, date class(i)Date classjava.util.Date. The da

control can be done by wise using the yield () function. Generally, do not rely on the thread priority to control the thread status.SummaryThis article describes how to use a thread in a Java program. A more important issue like whether to use a thread depends on the application at hand. One way to determine whether to use multithreading in an application is to estimate the amount of code that can be run in parallel. Remember the following points:Mul

Programming | server | network The Java Socket API provides a convenient object interface for network programming. This article uses a simple TCP Echo server as an example to demonstrate how to use Java to complete a network server. The TCP Echo server used as an example works in the following ways: When a client conne

Java advanced software architect practical video tutorial Spring + Mybatis + SpringMVC + Ehcache + Memcached + Redis + Nginx + Varnish + ActiveMQ + Keepalived + MySQL + MongoDB, keepalived Java high-level software architect Stage 1 video tutorial Thunder downloads Baidu clou

application based on MogileFS threeSection 140th: Small application based on MogileFS fourSection 141th: Integration of MogileFS and NginxSection 142th: Architecture changes after applying mogilefsSection 143th: The basic architecture of phase-a-small combination constructionSection 144th: Phase One project Overall package deploymentSection 145th: Test Nginx, Varnish and mogilefsSection 146th: Testing memcached and MongoDBSection 147th: Test application combined with ACTIVEMQ functionSection 14

Preface Have you ever encountered this situation: You want to splice a long string during javascript programming. If you still use the "+" Operator for processing, it means you are really amateur; maybe you will think that there is a class called StringBuilder in java specifically used to process String concatenation. Is there a similar class in javascript? Unfortunately, javascript does not provide similar