how to check jTable nullpointer in row

Question

how to check my jtable if null pointer? my code is always null pointer and then can't export to xls. this my code

if (tbGudangSales.getValueAt(i, 5).toString().trim().length() == 0) {
                        status = "tidak ada penjualan";
                    } else{
                        status = tbGudangSales.getValueAt(i, 5).toString();
                    }

                    label = new Label(4, baris, status, bordertabel);
                    excelSheet.addCell(label);

this my error

this my value table

Answer 1

All you need to do is to check if the value is null. For example:

Object value = tbGudangSales.getValueAt(i, 5);

if (value != null)
{
    if(value.toString().trim().isEmpty()) // instead checking the length "manually", you can use the isEmpty() method
    {
        status = "tidak ada penjualan";
    } 
    else
    {
        status = value.toString();
    }
}