Possible Duplicate:
searching files in eclipse
How to search for a particular word in entire workspace in Eclipse?
Possible Duplicate:
searching files in eclipse
How to search for a particular word in entire workspace in Eclipse?
In the "Search" menu there is a "File" option, which brings up a dialog. Fill in the word you are looking for and a pattern to restrict which files to search.
Entering "Search" into the help system would have got you this.
Select the workspace in the package explorer, open the File Search dialog, enter the particular world and *
as a file wildcard, restrict the search to the selection.