public static void main(String[]args) throws Exception {
Workbook wb = new XSSFWorkbook();
Sheet sheet1 = wb.createSheet("new sheet");
Sheet sheet2 = wb.createSheet("second sheet");
Sheet sheet3 = wb.createSheet("third sheet");
Sheet sheet4 = wb.createSheet("fourth sheet");
// Freeze just one row
sheet1.createFreezePane(0, 1, 0, 1);
// Freeze just one column
sheet2.createFreezePane(1, 0, 1, 0);