How to delete file?

Answer 1

If u mean delete your own proyects, go to te directory you set as workspace at the beggining, and then search the .java files. These are text files.

Answer 2

File in Java?
create a file:
File fileToDelete=new File("location");
fileToDelete.delete();

Answer 3

file as in what? like a program on your computer. if so just right click and delete :)