Eclipse IDE Tutorial:
The roots of Eclipse go back to 2001. The initial code base was provided by IBM. In November 2001, a consortium was formed to support the development of Eclipse as open source software. This consortium was controlled by IBM.
In 2004 it became the Eclipse Foundation , which is a vendor neutral foundation where no single company has control of the direction.
The Eclipse name at this time was viewed by many as declaration of war against Sun Microsystems , the company responsible for developing the Java programming language. IBM stated that the name was targeting at “Eclipsing” Microsoft. See http://www.eweek.com/c/a/Application-Development/Eclipse-Behind-the-Name/ – Eclipse: Behind the Name for details.
With the purchase of Sun Microsystems by Oracle this conflict finally went away. Oracle is currently among the 5 largest contributor companies of the Eclipse project.
Web Development for Beginners – Setting up Eclipse