[Demonstration 1]

[Buggy Method]
@Override
protected void setSheetAt(int sheetIndex) {
    sheet = workbook.getSheetAt(sheetIndex);
}

[Buggy Hunk]
sheet = workbook.getSheetAt(sheetIndex);

[Patch]
this.sheet = workbook.getSheetAt(sheetIndex);

[Demonstration 2]

[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 3]

[Buggy Method]
public void loadRotateExcel(DoubleProperty rotateProgressProperty) {
    Workbook wb = getWorkbook(ExcelSettings.rotateFilePath);
    if (wb == null) {
        log.error("workbook is null. Open sheet failed");
        return;
    }
    Sheet sheet = wb.getSheetAt(ExcelSettings.rotateSheetIndex - 1);
    if (sheet == null) {
        log.error("sheet is null. Open sheet failed");
        return;
    }
    int rowCount = sheet.getLastRowNum();
    for (Row row : sheet) {
        int rowNum = row.getRowNum();
        rotateProgressProperty.set(Math.min(1, (double) rowNum / rowCount));
        if (rowNum < ExcelSettings.rotateFirstDataRow)
            continue;
        //int columnCount = row.getPhysicalNumberOfCells();
        try {
            String kitName = getKitName(row, ExcelSettings.rotateKitColumn);
            String partNum = getPartNumber(row, ExcelSettings.rotatePartColumn);
            if (kitName.isEmpty() && partNum.isEmpty())
                continue;
            int pmQty = getExpectQty(row, ExcelSettings.rotatePmQtyColumn);
            if (pmQty == 0)
                continue;
            String ratio = getRatio(row, ExcelSettings.rotateRatioColumn);
            String remark = getRemark(row, ExcelSettings.rotateRemarkColumn);
            collection.addRotate(new RotateItem(rowNum, kitName, partNum, pmQty, ratio, remark));
        } catch (Exception e) {
            log.error("failed!", e);
        }
    }
    rotateProgressProperty.set(1.0);
    close(wb);
}

[Buggy Hunk]
int rowNum = row.getRowNum();

[Patch]
int rowNum = row.getRowNum() + 1;