При запуске этого кода отображается ошибка nullpointerException
Исключение в потоке "main" java .lang.NullPointerException в npackage.ReadindDataFromExcel.main (ReadindDataFromExcel. java: 48) *
public static void main(String[] args) throws Exception
{
System.setProperty("webdriver.chrome.driver", "C:\\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.get("http://newtours.demoaut.com");
//Excel File location
FileInputStream file = new FileInputStream("C://Datafirst.xls");
HSSFWorkbook workbook = new HSSFWorkbook(file);
HSSFSheet sheet = workbook.getSheet("Sheet1");
int noOfRows = sheet.getLastRowNum();
System.out.println("No.of Records in the Excel Sheet:" + noOfRows);
//int colcount=sheet.getRow(0).getLastCellNum();
for (int row = 0; row <= noOfRows; row++)
{
HSSFRow currentrow = sheet.getRow(row);
String First_name = currentrow.getCell(0).getStringCellValue();
}
}