Here's the code:

SXSSFWorkbook wb;
Sheet sheet;
Row r;
Cell cell;
InputStream inp;
        
try {
           
inp = new FileInputStream(sFileName);
        
            wb = new SXSSFWorkbook(new XSSFWorkbook(inp));
            
            cell = wb.getSheetAt(0).getRow(0).getCell(0);
            
            if(cell != null) {
                sOutput = cell.getStringCellValue();
                sOutput = sOutput + " in here!";
            } else {
                sOutput = "Nothing";
            }
            
            System.out.println(sOutput);
    
            inp.close();
          
        }
        catch(FileNotFoundException ex) {
            System.out.println(ex.getMessage());
        }
        catch(IOException | NullPointerException ex) {
            System.out.println(ex.getMessage());
        }