[Java]참 궁금한게 많습니다.(소스첨부)

		File dir = new File(".");
		String [] files = dir.list(new FilenameFilter(){
			public boolean accept(File dir, String strFile) {
				if(strFile.lastIndexOf(".") > -1) {
					return true;
				}
				else {
					return false; 
				}
				}
			});
		return files;