Speak Java in One Hour

8/12/2019 Speak Java in One Hour

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Speak Java in one hour

An introduction in Java lingo


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Wat is java?

Programmeertaal

Jvm

Platform

'Write Once, Run Anywhere'


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Acronymen hel

Java

Struts

JSFJ2EE

ADFSeam

WebSphere

JSR

Apache

TopLink

Hibernate

JavaFX JDBC

JVM

JavaDoc

Java ME

Java EE

Java SE

NetBeans

Swing

EJB

RMI

GlassFish

JMS

JMX

Spring

Maven

ant

NetBeans

Jre

JavaDesktop

Tomcat

Velocity

James Gosling

JPA

JAXB

Trinidad

MyFacesJDK

JavaBeans

JUnit

Drools

RichFaces

WebLogic

JBoss

JSP

Duke

AcegiAOP

Log4J

Applet

JAAS

EL

Servlet

Groovy

Stripes Tapestry

Wicket

Facelets

AWT

GWT

CocoonIceFaces

Java Web Start

iBatis

SDO

Tuscany

TestNg

AMIS

Lucene

JDO

POJO

Ajax

JCA

IIOP

JDom

JAXP

JAXB

war

ear

JNDI

SAAJ

JAX-RPC

SCA

JSTL

JIT

JCP


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Java language

Object orintatie

POJO

Plain Old Java Object

properties

methods

Netwerk support

Remoting


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Example

import java.net.*;

import java.io.*;

public class google {

public static void main (String[] args) {

try {

String thisLine;

URL u = new URL("http://www.google.com");

DataInputStream theHTML = new DataInputStream(u.openStream());

while ((thisLine = theHTML.readLine()) != null) {

System.out.println(thisLine);

}

} catch (MalformedURLException e) {

System.err.println(e);

} catch (IOException e) {

System.err.println(e);}

}

}


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.java .class

jvm

OS

compiler

jit compilation

platform / libraries

bytecode


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IDE

Code completion

Syntax Highlighting

Wizards Documentation

Refactoring

Unittest support

Delivery support

Compilation

Classpath organization

...

Eclipse

WSAD

JDeveloper

IntelliJ IDEA

NetBeans WebLogic Workshop

[Notepad]

...


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JVM

Platform specific

Run bytecode

normally, but not necessary, generated from java

source code

The JVM is distributed along with a set ofstandard class libraries which implement the

Java API (Application Programming

Interface) : JRE


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Java family / Platform

Java SE : Standard Edition

Java EE : Enterprise Edition

Java ME : MicroEdition

Java FX : Scripting & Mobile


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Java SE - Overview


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Delivery

jar file

java -jar MyApp


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Toepassingen

applets

Application in browser

GUI apps, Swing

Command line

Basis voor Java EE

Java in the DB

Webstart

automatic network distribution ...


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History


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Toepassingen

Web applications

Multitier

Distributed

Transactional

SOA

Integration

Web Services

Messaging

...


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Programming

Interfaces

Implementation is provided by vendors and

only partially by Java EE

(vendor specific) Extensible

JavaBeans


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Architecture

Clients

Application Server

EJB Container

EJB

EJB

EJB

Web Container

jsp

servlet

Other

Systems

Admin etc.


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Architecture


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Architecture


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Architecture


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JOnAS Architecture


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WebSphere Architecture


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Vendors

Oracle iAS

IBM WebSphere

BEA WebLogic

JBoss

GlassFish

Geronimo

JOnAS SAP Netweaver

Pramati

ATG Dynamo

Tomcat

Jetty

http://en.wikipedia.org/wiki/Comparison_of_application_servers#Java


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Servlets

Web application

Plain java

No visual representation

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class HelloWWW extends HttpServlet {

public void doGet(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("text/html");

PrintWriter out = response.getWriter();

out.println("\n" +

"\n" +

"Hello WWW\n" +

"\n" +

"Hello WWW\n" +

"");

}

}


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JSP

Web application

Visual

pre-compiled to servlet


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Jsp Examples

Hello, User

My name is Duke. What's yours?


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JDBC

import java.sql.*;

public class JdbcExample {

public static void main(String[] args) {

try {

DriverManager.registerDriver (new oracle.jdbc.driver.OracleDriver());

Connection conn = DriverManager.getConnection

("jdbc:oracle:thin:@oracle:1521:orcl","scott","tiger");

Statement stmt = conn.createStatement();

ResultSet r = stmt.executeQuery ("SELECT * FROM STD");

while (r.next())

System.out.println(r.getString(2) + " " + r.getString(4));r.close();

stmt.close();

conn.close();

} catch (Exception e) {

e.printStackTrace(System.out);

}

}

}

Java DataBase Connectivity

Interactie tussen java en database


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EJB

Server-side component architecture

Message Driven Beans

Session Beans

[Entity Beans]

[JPA (Java Persistense API)]

Complicated and Complex

Improved much with 3.0


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Issues

Java (SE / EE) only provides the basics

Reference implementation

J2EE is too complicated

Long / slow adaptation process for new

technologies


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Result

Framework 'hel'

Improvement of Java

EJB 3.0

Convention over configuration Java Persistence

JSF


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Struts

Apache Framework

de-facto Standard voor jsp development

Action based

Still alive

ADF v9

JSF


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JSF

Visual

Component based

Java EE Standard

/WEB-INF/faces-config.xml

A il bl t lib i


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Available component libraries

ADF Faces

JBoss RichFaces IceFaces

MyFaces

Tobago

Trinidad Quipukit

WebGalileoFaces

ILOG JSF tools

Jenia Woodstock

...

Hib t


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Hibernate

Framework voor de interactie tussen java

and de database map java objects to db tables

query en persist

~ ADF Business Components

~ Toplink


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Ontstaan uit onvrede over complexiteit Java

EE

Ease of development

Non invasive

Testability Inversion Of Control / Dependency Injection

S i Mi i St t t


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Spring Mission Statement

We believe that:

J2EE should be easier to use

It is best to program to interfaces, rather than classes. Springreduces the complexity cost of using interfaces to zero.

JavaBeans offer a great way of configuring applications.

OO design is more important than any implementation technology,such as J2EE.

Checked exceptions are overused in Java. A framework shouldn'tforce you to catch exceptions you're unlikely to be able to recoverfrom.

Testability is essential, and a framework such as Spring shouldhelp make your code easier to test.

We aim that:

Spring should be a pleasure to use Your application code should not depend on Spring APIs

Spring should not compete with good existing solutions, but shouldfoster integration.

S i P j t


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Spring Projects

Spring Framework

Spring Web Flow Spring Web Services

Spring Security (Acegi Security)

Spring Dynamic Modules For OSGi(tm) Service Platforms

Spring Batch

Spring Integration Spring LDAP

Spring IDE

Spring Modules

Spring JavaConfig

Spring Rich Client Spring .NET

Spring BeanDoc

ADF


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ADF

Visual and declarative development of J2EE

applications

Onderdelen

ADF Faces

ADF Business Components

ADF Model (binding)

SEAM


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SEAM

JBoss

Unify and integrate (o.a)

AJAX, JSF, EJB3, BPM


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Open Source


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Open Source

Huge impact on development with Java (EE)

Huge influence on Vendor products

Major adaptation

Struts, Hibernate, Spring, ...

MySQL, Subversion Donations

ADF -> Trinidad

Apache

SourceForge

CodeHaus

Apache


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Apache

Commons Utility methods for text, collections, io, en/decoding, http, etc

Struts, JSP

MyFaces, JSF

Trinidad, JSF

Velocity, templating

Tuscany, SOA Geronimo, AS

Lucene, searching

Tomcat, AS

Maven, build management

Harmony, Open Source Java SE

Synapse, ESB

...


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Java Community Process


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Java Community Process

Shapes and organizes the future of Java

JSR http://en.wikipedia.org/wiki/Java_Community_Process

The future


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The future

Jaca SE 7 - 2008

Java EE 6 - 2008

Java FX

Java everywhere

Framework shakeout?

Better Visual development


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Documents

Speak Java in One Hour