Quickly find a resource in the Workbench by searching resource names. You can also do contextual searches for information that is contained inside files.
In the Search Dialog, the File Search tab allows you to search for files or text in the Workbench. You can bring up the Search Dialog by clicking on the Search ...
Click on the menubar at Search --> File --> And than type in the name of your file. You can also choose, which filetype your file is, In which part of eclipse ...
In Eclipse you can use CTRL + H to perform either a file search, task search, Git search or Java search throughout a project, workspace or even package.