Question

I’m having a problem when passing the information from a table to a bidimensional Array

for (int i=0; i < DefaultTableModel.getRowCount(); i++) {
    for (int j=0; j < DefaultTableModel.getColumnCount(); j++) {
        dataConteo[i][j]=DefaultTableModel.getValueAt(i,j);
    }
}

I completely fill the table and still im getting an error in

dataConteo[i][j]=DefaultTableModel.getValueAt(i,j);

with NullPointerException.

Answer 1

Assuming model isn’t null….

Before the for loop, did you allocate the dataConteo array? Replace Type with the actual type.

Type[][] dataConteo = new Type[model.getRowCount()][model.getColumnCount()];