[Demonstration 1]

[Buggy Method]
@Override
public ListenableFuture<ExpiringGraph> getDefaultGraph() {
    SettableFuture<ExpiringGraph> future = SettableFuture.create();
    try {
        lockDataset();
        Query query = QueryFactory.create("SELECT ?s ?p ?o WHERE {?s ?p ?o}");
        ListenableFuture<QueryExecutionResults> resultsFuture = processSparqlQuery(query);
        Futures.addCallback(resultsFuture, new FutureCallback<QueryExecutionResults>() {

            @Override
            public void onSuccess(QueryExecutionResults queryExecutionResults) {
                Model model = Converter.toModel(queryExecutionResults.getResultSet());
                future.set(new ExpiringGraph(model, new Date()));
            }

            @Override
            public void onFailure(Throwable throwable) {
                future.setException(throwable);
            }
        });
    } catch (Exception ex) {
        LOG.error("Could not read default (union) graph: {}", ex);
        future.setException(ex);
    } finally {
        unlockDataset();
    }
    return future;
}

[Buggy Hunk]
SettableFuture<ExpiringGraph> future = SettableFuture.create();

[Patch]
final SettableFuture<ExpiringGraph> future = SettableFuture.create();

[Demonstration 2]

[Buggy Method]
public void extractEntities(String input, final Context context) {
    Ion.with(context).load("https://api.idolondemand.com/1/api/async/extractentities/v1").setBodyParameter("apikey", GlobalConstants.idolApiKey).setBodyParameter("text", input).setBodyParameter("unique_entities", "true").setBodyParameter("entity_type", "people_eng").asJsonObject().setCallback(new FutureCallback<JsonObject>() {

        @Override
        public void onCompleted(Exception e, JsonObject result) {
            if (e != null) {
                e.printStackTrace();
            }
            String jobID = result.get("jobID").getAsString();
            Ion.with(context).load("https://api.idolondemand.com/1/job/result/" + jobID).setBodyParameter("apikey", GlobalConstants.idolApiKey).asJsonObject().setCallback(new FutureCallback<JsonObject>() {

                @Override
                public void onCompleted(Exception e, JsonObject result) {
                    JsonArray var1 = result.getAsJsonArray("actions");
                    System.out.println(var1);
                    JsonObject var2 = var1.get(0).getAsJsonObject();
                    System.out.println(var2);
                    JsonObject var3 = var2.getAsJsonObject("result");
                    JsonArray var4 = var3.getAsJsonArray("entities");
                    if (var4.size() > 0) {
                        entities.clear();
                        for (int i = 0; i < var4.size(); i++) {
                            JsonObject var5 = var4.get(0).getAsJsonObject();
                            String var6 = var5.get("normalized_text").getAsString();
                            entities.add(var6);
                        }
                        ((ArrayAdapter<String>) listView.getAdapter()).notifyDataSetChanged();
                    }
                }
            });
        }
    });
}

[Buggy Hunk]
JsonObject var5 = var4.get(0).getAsJsonObject();

[Patch]
JsonObject var5 = var4.get(i).getAsJsonObject();

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));