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Keywords
Java
JVM
ArrayList
JRE
JDK
J2SEPOJO
Bytecode
JAR
Main class
Manifest.MF
.class
Javadoc
Object.class
debugger
UML
Object language
Reflectionheap
GC
Keywords
JavaEEJSF
@EJBJMS
JPAValidation
CriteriaBuilder
JPQL NativeQueryRenderer
@MessageDrivenBean
@PersistenceContext
@Inject
@SessionScope
@ManagedBean
@NotNull
Transaction
@TransactionAttributecomponent
@Converter
@ValidatorEntityManager
@Resource
@Stateless
container
JCP JSR
Java Coffee A technology invented by Sun Microsystem now an Oracle product. A programming language « Write once, run everywhere ».
JVM – Java Virtual Machine. It abstracts your OS and executes the Java byte code.
Java
JRE – Java Runtime Environment . Set of tools aims to execute a Java program The virtual machine The byte code interpreter and converter into native code The standard Java API
JDK – Java Standard Development Kit. It’s your toolbox. It allows to write Java source code and compiles it into byte code. Javac, the java compiler which converts source code (.java) into byte code
(.class) Jar, the java archiver. It archives a set of class files into a jar file Javadoc, the documentation generator (abuse it!) Jdb, the java debugger A JRE
Java
Java 2 SE Java SE Java Standard Edition. Contains the basics API. It’s desktop
computer oriented. A set of basics API
Example: Collections, Date, Math, etc Major release versions of Java:
JDK 1.0 (January 21, 1996) JDK 1.1 (February 19, 1997) J2SE 1.2 (December 8, 1998) J2SE 1.3 (May 8, 2000) J2SE 1.4 (February 6, 2002) J2SE 5.0 (September 30, 2004) Java SE 6 (December 11, 2006) Java SE 7 (July 28, 2011) Java SE 8 (March 18, 2014)
Java SE
Java SE
Specifications of standard API Defined by the Java Community Process (JCP)
Java Specification Requests (JSRs): proposed and final specifications Different implementation of same API
Example: JPA is implemented by Eclipselink, OpenJPA, Hibernate Certifications Architecture pattern
Large scale Multi-tiers (Presentation Logic, Business Logic, Persistence) Scalable Reliable Secure
J2EE = an extension of Java SE to facilitate the development of enterprise applications ?
Java EE
Version History Java EE 8 (expected mid 2017)
Java EE
Java EE 6 (JSR 316)
Java EE 7 (JSR 342)
Java EE 6
EJB Lite in Web Profile
Java EE architecture
Client
Database
EJB Container
Web Container
Application Client
Web Browser
Enterprise Bean
Servlet JSP Page
Java EE Server
Enterprise Bean
Enterprise Bean
JSP PageServlet
• Presentation Tier• Business Logic Tier• Data (EIS) Tier
Java EE servers ‘’Java EE is a set of specifications implemented by different containers. Containers
are Java EE runtime environment that provides certain services to the component they host… ’’
Antonio Goncalves, Beginning Java EE 6 Platform with GlassFish 3
J2EE server = Web container + J2EE implementation
Java EE 6 APIs
Java EE 7 APIs
J2EE APIs – The big picture
Java EE Ecosystem - Frameworks
Web Technology
Admin Template
jar – EJB Module war – web module
normally contain several Servlets, JavaServer Pages and other Web resources e.g. HTML files, graphics files, audio files and movies
jar – Application Client rar – Resource Adapter
Module
Java EE Packaging
Configuratoin in xml file is optional since Java EE 6
J2EE extends J2SE J2EE is multi-tiers/layered J2EE is a set of specifications, not a set of
implementations J2EE server = container + J2EE implementations A J2EE server host J2EE applications
To sum up
