Noweb will upload files relative to the current working directory or the specified absolute path. Just do not use * at the end of your file name (so as not to insert # preprocessor directives). I would recommend using% def with @ to show where you define and use names.
<</path/to/file.java>>=
reallyImportantVariable += 1;
@ %def reallyImportantVariable
noweb ( ) , , javac .
, , , javadoc, , , , noweb.