[Demonstration 1]

[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));

[Demonstration 2]

[Buggy Method]
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    try {
        String search = request.getParameter("search");
        if (search == null || search.equals("")) {
            doGet(request, response);
        }
        request.setAttribute("currentPage", 0);
        DAOService service = new DAOServiceImpl();
        ArrayList<Computer> listComputer = service.listComputers(search).getListPage();
        request.setAttribute("debut", 0);
        request.setAttribute("fin", 0);
        request.setAttribute("countComputer", listComputer.size());
        request.setAttribute("sizePages", listComputer.size());
        request.setAttribute("listComputers", listComputer);
    } catch (SQLException e) {
        logger.error("" + e);
    }
    request.getRequestDispatcher("/views/dashboard.jsp").forward(request, response);
}

[Buggy Hunk]
request.setAttribute("listComputers", listComputer);

[Patch]
request.setAttribute("listComputers", service.convertComputerToComputerDTO(listComputer));

[Demonstration 3]

[Buggy Method]
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_book, menu);
    MenuItem searchItem = menu.findItem(R.id.action_search);
    SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
    searchView.setQueryHint(getString(R.string.search_hint));
    searchView.setOnQueryTextListener(this);
    if (!search.isEmpty()) {
        searchItem.expandActionView();
        searchView.setQuery(search, false);
        searchView.clearFocus();
    }
    return true;
}

[Buggy Hunk]
if(!search.isEmpty()){

[Patch]
if(search != null && !search.isEmpty()){