Dive Into Java A Roadmap to Effective Java Programming

When do you KNOW a language? When you know the syntax? When you can write software with it? When you know where’s the manual? When you use the language for N years? When you can consult others?

When you know the syntax?

When you can write software with it?

When you know where’s the manual?

When you use the language for N years?

When you can consult others?

NO When you know the syntax? When you can write software with it? When you know where’s the manual? When you use the language for N years? When you can consult others?

When you know the syntax?

When you can write software with it?

When you know where’s the manual?

When you use the language for N years?

When you can consult others?

You KNOW a language when... When you know the difference in syntax between versions When you can write maintainable software with it efficiently When you know how to use the manual When you use the language actively for N years and keep up with it’s evolution When you can consult others on advanced topics

When you know the difference in syntax between versions

When you can write maintainable software with it efficiently

When you know how to use the manual

When you use the language actively for N years and keep up with it’s evolution

When you can consult others on advanced topics

AND When you know when , how and why you should use tooling and third party extensions (A good IDE, Build / Dependency М anagement, Frameworks, Libraries) When you know and use it’s main concepts and methodologies in practice (For Java its Object Oriented Programming and Design Patterns)

When you know when , how and why you should use tooling and third party extensions (A good IDE, Build / Dependency М anagement, Frameworks, Libraries)

When you know and use it’s main concepts and methodologies in practice (For Java its Object Oriented Programming and Design Patterns)

Learning Java is learning… Java

Learning Java is learning…

We’ll look a bit more at OOP Principles / Design Patterns Fundamentals Difference from Procedural Programming (PL/SQL) Java Specific stuff you MUST know Tooling What to use and what to avoid IDE Building / Dependency Management Frameworks Spring Hibernate

OOP Principles / Design Patterns

Fundamentals

Difference from Procedural Programming (PL/SQL)

Java Specific stuff you MUST know

Tooling

What to use and what to avoid

IDE

Building / Dependency Management

Frameworks

Spring

Hibernate

Object Oriented Programming http://en.wikipedia.org/wiki/Object_oriented A-Must Book: “ Design Patterns: Elements of Reusable Object-Oriented Software ” by “Gang of Four” ( Erich Gamma , Richard Helm , Ralph Johnson , John M. Vlissides ) Common mistakes PL/SQL programmers make Thinking that PL/SQL skills are enough to code Java Doing everything with IF/ELSE, WHILE, FOR, SWITCH. Long methods. 30 lines is a long method. 300 is Sparta... And Sparta failed. Creating Superobjects and Monolithic Entities.

http://en.wikipedia.org/wiki/Object_oriented

A-Must Book: “ Design Patterns: Elements of Reusable Object-Oriented Software ” by “Gang of Four” ( Erich Gamma , Richard Helm , Ralph Johnson , John M. Vlissides )

Common mistakes PL/SQL programmers make

Thinking that PL/SQL skills are enough to code Java

Doing everything with IF/ELSE, WHILE, FOR, SWITCH.

Long methods. 30 lines is a long method. 300 is Sparta... And Sparta failed.

Creating Superobjects and Monolithic Entities.

More Common Mistakes import org .apache .xml .* ; Ignoring Java Code Conventions: http://java.sun.com/docs/codeconv/ No comments or //-- useless /* comments */ instead of JavaDoc: http://java.sun.com/j2se/javadoc/writingdoccomments/ Pasting code from G o o g l e search results Copy/Paste.

import org .apache .xml .* ;

Ignoring Java Code Conventions: http://java.sun.com/docs/codeconv/

No comments or //-- useless /* comments */ instead of JavaDoc: http://java.sun.com/j2se/javadoc/writingdoccomments/

Pasting code from G o o g l e search results

Copy/Paste.

Design Patterns Why do we need Design Patterns? Dependency Injection Patterns of Enterprise Application Architecture Enterprise Integration Patterns Read Books!

Why do we need Design Patterns?

Dependency Injection

Patterns of Enterprise Application Architecture

Enterprise Integration Patterns

Read Books!

Tooling vim? JDeveloper? NetBeans? Eclipse? IntelliJ IDEA?

vim?

JDeveloper?

NetBeans?

Eclipse?

IntelliJ IDEA?

Tooling vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java. JDeveloper? NetBeans? Eclipse? IntelliJ IDEA?

vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java.

JDeveloper?

NetBeans?

Eclipse?

IntelliJ IDEA?

Tooling vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java. JDeveloper? – It’s what Oracle wants you to use. And Oracle should keep it’s hands away from Java. NetBeans? Eclipse? IntelliJ IDEA?

vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java.

JDeveloper? – It’s what Oracle wants you to use. And Oracle should keep it’s hands away from Java.

NetBeans?

Eclipse?

IntelliJ IDEA?

Tooling vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java. JDeveloper? – It’s what Oracle wants you to use. And Oracle should keep it’s hands away from Java. NetBeans – OK. Has improved a lot, but... Eclipse? IntelliJ IDEA?

vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java.

JDeveloper? – It’s what Oracle wants you to use. And Oracle should keep it’s hands away from Java.

NetBeans – OK. Has improved a lot, but...

Eclipse?

IntelliJ IDEA?

Tooling vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java. JDeveloper? – It’s what Oracle wants you to use. And Oracle should keep it’s hands away from Java. NetBeans – OK. Has improved a lot, but... Eclipse – Open Source, fast*, plugable IntelliJ IDEA?

vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java.

JDeveloper? – It’s what Oracle wants you to use. And Oracle should keep it’s hands away from Java.

NetBeans – OK. Has improved a lot, but...

Eclipse – Open Source, fast*, plugable

IntelliJ IDEA?

Tooling vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java. JDeveloper? – It’s what Oracle wants you to use. And Oracle should keep it’s hands away from Java. NetBeans – OK. Has improved a lot, but... Eclipse – Open Source, fast*, plugable IntelliJ IDEA – shareware, but a good one

vim? – it’s a Swiss Army Knife, but you need serious heavy artillery for Java.

JDeveloper? – It’s what Oracle wants you to use. And Oracle should keep it’s hands away from Java.

NetBeans – OK. Has improved a lot, but...

Eclipse – Open Source, fast*, plugable

IntelliJ IDEA – shareware, but a good one

Tooling Building Manual Apache Ant Maven 2 Dependency Management Manual Maven 2 Debugging Manual With IDE Conclusion Automate Everything ! Always use Maven 2 You may want to use Ant for specific low-level tasks

Building

Manual

Apache Ant

Maven 2

Dependency Management

Manual

Maven 2

Debugging

Manual

With IDE

Conclusion

Automate Everything !

Always use Maven 2

You may want to use Ant for specific low-level tasks

Frameworks What EVERY Java developer should know Spring Framework ( www.springframework.org ) Full Stack. Lightweight J2EE. Hibernate ( www.hibernate.org ) Database Persistence. There’s more For almost anything… Avoid Oracle Frameworks (like ADF ) Closed Source

What EVERY Java developer should know

Spring Framework ( www.springframework.org )

Full Stack. Lightweight J2EE.

Hibernate ( www.hibernate.org )

Database Persistence.

There’s more

For almost anything…

Avoid

Oracle Frameworks (like ADF )

Closed Source

Don’t Get Rusty Subscribe to RSS feeds! http://www.dzone.com/links/tag/java.html http://www.theserverside.com http://www.infoq.com http://www.javaworld.com The Internet is full of more resources Read Books! Documentation at java.sun.com “ Head First” series Martin Fowler’s writings “ Effective Java” “ Java Concurrency in Practice” Prefer reading NEW books (less than 3 years old), except for the true classics Don’t read misguiding stuff! “ Learn Java in 21 days” “ Sam’s Teach Yourself Java in a week” “ Java Tutorial” at oracle.com Most solutions in various forums and Google search results are bad or outdated examples

Subscribe to RSS feeds!

http://www.dzone.com/links/tag/java.html

http://www.theserverside.com

http://www.infoq.com

http://www.javaworld.com

The Internet is full of more resources

Read Books!

Documentation at java.sun.com

“ Head First” series

Martin Fowler’s writings

“ Effective Java”

“ Java Concurrency in Practice”

Prefer reading NEW books (less than 3 years old), except for the true classics

Don’t read misguiding stuff!

“ Learn Java in 21 days”

“ Sam’s Teach Yourself Java in a week”

“ Java Tutorial” at oracle.com

Most solutions in various forums and Google search results are bad or outdated examples

Where to start? Download the latest Eclipse ( www.eclipse.org ), hit F1 and go through Java Development tutorial. Download Maven 2 ( maven.apache.org ), Install Maven Integration in Eclipse ( http://code.google.com/p/q4e/wiki/Installation ), read the manuals, play around. Read “Head First Java” ( http://knowfree.net/2008/03/03/head-first-java-2nd-edition-excellent-book-from-o-reilly.kf ) Read “Head First Design Patterns” ( http://www.freebookspot.com/Comments.aspx?Element_ID=2985 ) Try Spring Framework (add the dependency with Maven. Find the dependency at www.mvnrepository.com ). Read Spring documentation (especially parts about Dependency Injection) at www.springframework.org Subscribe to RSS feeds mentioned earlier and follow what the community is up to

Download the latest Eclipse ( www.eclipse.org ), hit F1 and go through Java Development tutorial.

Download Maven 2 ( maven.apache.org ), Install Maven Integration in Eclipse ( http://code.google.com/p/q4e/wiki/Installation ), read the manuals, play around.

Read “Head First Java” ( http://knowfree.net/2008/03/03/head-first-java-2nd-edition-excellent-book-from-o-reilly.kf )

Read “Head First Design Patterns” ( http://www.freebookspot.com/Comments.aspx?Element_ID=2985 )

Try Spring Framework (add the dependency with Maven. Find the dependency at www.mvnrepository.com ). Read Spring documentation (especially parts about Dependency Injection) at www.springframework.org

Subscribe to RSS feeds mentioned earlier and follow what the community is up to

Questions?