What I usually do is, in Eclipse preferences, I define an Installed JRE called "JDK X.Y.Z" and include tools.jar as part of it libraries. Then I change the project preferences to use that JRE "JDK X.Y.Z".
InstaSearch is an Eclipse plug-in for doing fast text search in the workspace. The search is performed instantly as-you-type and resulting files are displayed in an Eclipse view. It is a lightweight plug-in based on Apache Lucene search engine. Each file then can be previewed using few most matching and relevant lines. A double-click on the match leads to the matching line in the file. Main Features Instantly shows search results Shows suggestions using auto-completion
Help -> Install New Software
Choose "Helios - http://download.eclipse.org/releases/helios" site
Expand "Web, XML, and Java EE Development"
Check JST Server Adapters (version 3.2.2)
G. Schmidt, und I. Novakovic. Proceedings of the Poster and Demonstration Session at the 7th International Semantic Web Conference (ISWC 2008), Karlsruhe, Germany, (2008)
A. Mishra, J. Jose, und K. Sompura. International Journal on Recent and Innovation Trends in Computing and Communication, 3 (2):
799--802(Februar 2015)