Java Networking - Tutorial

This article describes how to use the java.net package to access the Internet. The setting of a proxy is also described.
http://www.vogella.com/articles/JavaNetworking/article.html

How to create Eclipse plugins from jars

This article describes how to create Eclipse plugins (OSGi bundles) from standard Java libraries delivered as jars. This article is based on Eclipse 3.6 (Helios).
http://www.vogella.com/articles/EclipseJarToPlugin/article.html

FindBugs in Eclipse - Tutorial

This article will describe the usage of the Findbugs plugin for Eclipse. Article is based on Eclipse 3.6 (Helios).
http://www.vogella.com/articles/Findbugs/article.html

Checkstyle in Eclipse

This article will describe the usage of the Checkstyle plugins for Eclipse.
http://www.vogella.com/articles/Checkstyle/article.html

Java Emitter Template (JET) - Tutorial

This article describes the usage of Eclipse JET to transform Eclipse EMF models into other output. This article is based on Eclipse 3.6 (Helios).
http://www.vogella.com/articles/EclipseJET/article.html

Eclipse Modeling Framework (EMF) - Tutorial

This tutorial describes the usage of the Eclipse EMF framework for modeling your data model and creating Java code from it. This tutorial is based on Eclipse 3.7 (Indigo).
http://www.vogella.com/articles/EclipseEMF/article.html

Design Patterns in Java - Singleton

This article describes the Design Pattern "Singleton" and its usage in the programming language Java.
http://www.vogella.com/articles/DesignPatternSingleton/article.html