These 25 points will help you become a JAVA master

Want to become a Java expert? Why not learn 25 key points.

　1. You need to be proficient inObject-orientedanalysis and design (OOA/OOD), involving patterns (GOF, J2EEDP) and integrated mode. You should know UML, especially class, object, interaction and stated diagrams.

　2. You need to learn the basic knowledge of Java language and its core Class Library(collections, serialization, streams, networking, multithreading, reflection, event, handling, NIO, localization and others ).

　3. You should understand the basic working mechanisms of JVM, classloaders, classreflect and garbage collection. You should be able to decompile a class file and understand some basic assembly instructions.

　4. If you are going to write client programs, you need to learn Web applets and master the ideas and methods of GUI design, as well as SWING, AWT, and SWT of desktop programs. You should also have an understanding of the JavaBEAN component pattern for UI widgets. JavaBEANS is also used in JSP to separate business logic from the presentation layer.

　5. You need to learn Java database technology and be able to use at least one persistence/ORM architecture, such as Hibernate, JDO, CocoBase, TopLink, InsideLiberator (domestic JDO red factory software) or iBatis.

　6. You should also understand the meaning of object-relational impedance mismatch and how it affects the interaction of business objects with the relational database, and its operating results. You also need to master the use of different database products, such as Oracle, MySQL, and SQL server.

　7. You need to learn Servlets, JSP, and JSTL (StandardTagLibraries) and optional third-party TagLibraries.

8. You need to be familiar with mainstream web page frameworks , such as JSF, Struts, Tapestry, Cocoon, WebWork, and their following related patterns, such as MVC/MODEL2.

　9. You need to learn how to use and manage web servers, such as tomcat, resin, and Jrun, and know how to expand and maintain web programs based on them.

　10. You need to learn distributed objects and remote API, such as RMI and RMI/IIOP.

　11. You need to master various popular middleware technical standards and their implementation in combination with Java, such as Tuxedo, CROBA, and of course JavaEE itself.

　12. You need to learn at least one XMLAPI, such as JAXP (JavaAPIforXMLProcessing), JDOM (JavaforXMLDocumentObjectModel), DOM4J or JAXR (JavaAPIforXMLRegistries).

　13. You should learn how to use Java APIs and tools to build WebServices. For example, JAX-RPC (JavaAPI for XML/RPC), SAAJ (SOAPwithAttachmentsAPIforJava), JAXB (JavaArchitectureforXMLBinding), JAXM (JavaAPIforXMLMessaging), JAXR (JavaAPIforXMLRegistries) or JWSDP (JavaWebServicesDeveloperPack).

　14. You need to learn a lightweight application framework, such as Spring, PicoContainer, Avalon, and their IoC/DI styles (setter, constructor, interfaceinjection).

　15. You need to be familiar with different J2EE technologies, such as JNDI (JavaNamingandDirectoryInterface), JMS (JavaMessageService), JTA/JTS (JavaTransactionAPI/JavaTransactionService), JMX (JavaManagementeXtensions), and JavaMail.

16. You need to learn Enterprise JavaBeans (EJB) and their different component patterns: Stateless/StatefulSessionBeans, EntityBeans (including Bean-ManagedPersistence [BMP] or Container-ManagedPersistence [CMP] and its EJB-QL ), or Message-DrivenBeans(MDB).

　17. You need to learn how to manage and configure a J2EE application server, such as WebLogic, JBoss, etc., and take advantage of its additional services, such as clustering, connection pooling, and distributed processing support. You also need to understand how to package and configure applications on it and be able to monitor and tune its performance.

　18. You need to be familiar with aspect-oriented programming and attribute-oriented programming (both confusingly abbreviated as AOP), as well as their mainstream Java specifications and implement. For example AspectJ and AspectWerkz.

　19. You need to be familiar with different useful APIs and frame work to serve you. For example, Log4J (logging/tracing), Quartz (scheduling), JGroups (networkgroup communication), JCache (distributedcaching), Lucene (full-textsearch), JakartaCommons, etc.

　20. You should be proficient in a Java IDE such as sunOne, netBeans, IntelliJIDEA or Eclipse. (Some people prefer VI or EMACS to write files. Whichever you use)

　21. Java (some configurations to be precise) is verbose, it requires a lot of manual coding (e.g. EJB), So you need to be familiar with code generation tools such as XDoclet.

　22. You need to be familiar with a unit testing system (JNunit), and learn different generation and deployment tools (Ant, Maven).

　23. You need to be familiar with some software engineering processes that are often used in Java development. For example, RUP (Rational Unified Process) and Agile methods.

　24. You also need to keep up with the pace of Java development. For example, you can now learn Webwork2.0 in depth.

　25. You must have some understanding of the development process of actual projects. There must be at least two projects with practical application value, not practice projects! Because now what companies value is whether you have actual development Experience, the embodiment of real development experience is the projects you do, that is, projects with practical applications!

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