Does a "Find in project..." feature exist in Eclipse IDE?

Ctrl + Alt + G can be used to find selected text across a workspace in eclipse.

OSX: ⌥ Option + ⌘ Command + G

1. Ctrl + H
2. Choose File Search for plain text search in workspace/selected projects

For specific expression searches, choose the relevant tab (such as Java Search which allows you to search for specific identifiers)

For whole project search:

3. Scope (in the form section) > Enclosing project (Radio button selection).

Press Ctrl + H to bring up the search that includes options to search via project, directory, etc.