code: public void setSrcExtensions(String srcExts)
  	{
  		StringTokenizer tok = new StringTokenizer(srcExts, ",");
  		while (tok.hasMoreTokens())
  			_srcExts.add(tok.nextToken());
  	}
docs: The srcExtensions attribute can be set to a comma-separated list of source filename
  extensions that are considered to be valid inputs to APT processing.
  The default value is "*.java".