Get the file name without file extension in a Vim function

Question

I want to get the file name without the file extension in Vim.

I wrote the following function in my .vimrc file to compile and run the Java program:

:function! JAVA_RUN() :!javac %^M :endfunction  map <F3> :execute JAVA_RUN()<CR> :source $HOME/.vimrc<CR> 

How can I get the file name without the extension inside the function?

Answer 1

:help expand() should give you the answer, see expand().

You should use the r modifier for %, with %:r instead of % to get the file name without extension.

If you want to write functions to build and execute files, you should also have a look at the documentation for shellescape, in order to prevent problems with spaces in file name or path.