我使用bytes.tobytes（）来设置扫描范围，如果输入stumber=“aaaa00000”，结果是“aaaa000000”~“aaaaaa000008”，为什么不包括“aaaa000009”？

for (String stumber : stumbersArr) {
    byte[] startRow = Bytes.toBytes(stumber + "0");
    byte[] endRow = Bytes.toBytes(stumber + "9");

    Scan scan = new Scan(startRow, endRow);

    Filter filter1 = new RowFilter(CompareFilter.CompareOp.EQUAL, new SubstringComparator(stumber));

    scan.setFilter(filter1);
    scan.setMaxVersions(versions);

    ResultScanner scanner1 = table.getScanner(scan);
    Cell[] cells;
    for (Result res : scanner1) {
        cells = res.rawCells();
        list.addAll(getHBaseTableDataListFromCells(cells));
    }
}