Installing Eclipse
Installing Eclipse is simple. It just involves unzipping the downloaded file into a directory. After unzipping the Eclipse IDE is ready to run. You may wish to create a shortcut to the executable on your desktop to simplify starting Eclipse.
Eclipse can be run by executing the file startup.jar. If Java Environment (JAVA_HOME) variables are defined then Eclipse IDE will automatically detect the JRE and start running.
Updating Eclipse
There is a wide variety of plugins for various programming languages and other development-oriented tools (such as modeling, database browsing, etc.).