How to convert the class files to java files? any help will be appreciated!

[javel...@gmail.com]

Hi there Selenium user, 

Its a general questions.. I had created few class under new project and package, I have no idea what happened all of the files (which where working file before) have been converted to class files , they were java files before.. I am new to java and never had this program before.. 

Can anyone please help how I can fix this?? 

Thanks!!