Eclipse IDE for Java EE Developers
Download the Eclipse IDE for Java EE Developers package.
http://www.eclipse.org/downloads/packages/eclipse-ide-java-ee-developers/ganymedesr1
Install
Extract the "eclipse" folder from downloaded zip file to a proper location. To make sure Eclipse IDE can be run in your system, execute the eclipse.exe (in windows environment) or eclipse (in *nix environment) in that eclipse folder to start up the Eclipse IDE.
We recommend to set the default JRE of Eclipse to JDK, refer to the Setup/Preferences section in WTP Tutorials – Building and Running a Web Application http://www.eclipse.org/webtools/community/tutorials/BuildJ2EEWebApp/BuildJ2EEWebApp.html
We recommend to modify some parameters in the configuration file eclipse.ini to gain performance, please refer to http://www.eclipsezone.com/eclipse/forums/t61618.html and http://blog.xam.dk/archives/68-Eclipse-and-memory-settings.html