To search a project’s files, right-click on the project and select Find...
The Find in Files utility supports searching a project’s file contents or file names. The search input fields supports simple text matching and regular expressions.
Containing Text. The string you are looking for. If File Name Patterns is empty, all files are searched.
File Name Patterns. The files you are searching in. If the Containing Text field is empty you get a listing of files that match the pattern.
The Options Whole Words, Match Case, and Regular Expression further restrict the search. Regular Expression Constructs are fully explained in:http://java.sun.com/javase/6/docs/api/java/util/regex/Pattern.html#sum