Finding Strings to Externalize
    To find strings to externalize:
    
  - In a Java view (e.g. Package Explorer), select a set of packages, source 
    folders or projects.
- From the menu bar, select Source > Externalize Strings...
- A dialog comes up with a list of all compilation units that have some non-externalized 
    strings
- In the dialog, you can double click on a listed compilation unit or press 
    the Externalize button to open the Externalize Strings wizard
String externalization
    
     Finding unused and incorrectly used keys in property files
    
     Externalize strings wizard
     Source menu