regex - Remove comments from a java file and maintain file structure -


i working on project requires me remove comments java file. currently, using regular expression 

(?:/\\*(?:[^*]|(?:\\*+[^*/]))*\\*+/)|(?://.*)

which got http://ostermiller.org/findcomment.html.

the regular expression works well, problem need preserve file structure when remove comments. in other words, if have 3 line block comment, need replaced 3 blank lines. necessary code remains on same line numbers original.

how replace 3 line block comment 3 blank lines?

edit: able solve problem making use of sablecc.

i haven't sussed out regex doing, if matches entire comment, can matched comment, check see how many newlines contains, , replace match many newlines instead of replacing empty string.


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