File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Programmer Certification (SCJP/OCPJP) and the fly likes Is empty file is valid java source file? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of Head First Android this week in the Android forum!
JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
Bookmark "Is empty file is valid java source file?" Watch "Is empty file is valid java source file?" New topic

Is empty file is valid java source file?

Krishna Srinivasan
Ranch Hand

Joined: Jul 28, 2003
Posts: 1849

I have read in one book,that is Is empty source file a valid java source file?The answer they gave is yes.I could not get the right explanation.
i don'y know what they mean.withot interface,class,package,import how can a file will be a valid source file?
Its confusing me.

Krishna Srinivasan
OCAJP 7/8 Exam, 400+ OCPJP Mock Questions
Valentin Crettaz
Gold Digger

Joined: Aug 26, 2001
Posts: 7610
If you browse to JLS 7.3: Compilation Units, you will see that a compilation unit (i.e., a Java source file) is composed of three high level elements, called PackageDeclaration, ImportDeclarations, and TypeDeclarations. All of them are optional, which clearly means that an empty compulation unit is a valid java file.
I hope this clears your doubts.

[Blog] [Blogroll] [My Reviews] My Linked In
It is sorta covered in the JavaRanch Style Guide.
subject: Is empty file is valid java source file?
jQuery in Action, 3rd edition