IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(
                indexLocation)));
        IndexSearcher searcher = new IndexSearcher(reader);


        s = "";
        while (!s.equalsIgnoreCase("q")) {
            TopScoreDocCollector collector = TopScoreDocCollector.create(100, true);
            try {
                System.out.println("Enter the search query (q=quit):");
                s = br.readLine();
                if (s.equalsIgnoreCase("q")) {
                    break;
                }

                Query q = new QueryParser(Version.LUCENE_47, "contents", analyzer).parse(s);
                searcher.search(q, collector);
                ScoreDoc[] hits = collector.topDocs().scoreDocs;
                // 4. display results
                System.out.println("Found " + hits.length + " hits.");
                for (int i = 0; i < hits.length; ++i) {
                    int docId = hits[i].doc;
                    Document d = searcher.doc(docId);
                    System.out.println((i + 1) + ". " + d.get("path")
                            + " score=" + hits[i].score);
                }
                // 5. term stats --> watch out for which "version" of the term
                // must be checked here instead!
                Term termInstance = new Term("contents", s);
                long termFreq = reader.totalTermFreq(termInstance);
                long docCount = reader.docFreq(termInstance);
                System.out.println(s + " Term Frequency " + termFreq
                        + " - Document Frequency " + docCount);

            } catch (Exception e) {
                System.out.println("Error searching " + s + " : "
                        + e.getMessage());
                break;
            }

        }