Error when delete row from Jtable

Question

My Jtable have a listSelectionListener :

jTable1.getSelectionModel().addListSelectionListener(new ListSelectionListener() {

        @Override
        public void valueChanged(ListSelectionEvent e) {
            System.out.println(jTable1.getValueAt(jTable1.getSelectedRow(), 0));
        }
    });

i create a button to delete all rows of Jtable with event:

for (int i =jTable1.getModel().getRowCount()-1; i >=0 ; i--) {
        ((DefaultTableModel)jTable1.getModel()).removeRow(i);
    }

If i press the button without choosing any row ,there is no error but when i choose a row then press the button i get this error:

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1

This don't happen when table don't have ListSelectionListener. Where do i wrong?

Thanks in advance for help with this.

System.out.println(jTable1.getValueAt(jTable1.getSelectedRow(), 0)); - jTable1.getSelectedRow() will return -1 if no row is selected. — Bon, Oct 31 '15 at 09:33

score 1 · Answer 1 · answered Oct 31 '15 at 09:31

1

Can you try with this?

DefaultTableModel dtm = (DefaultTableModel) jTable1.getModel();
dtm.setRowCount(0);

answered Oct 31 '15 at 09:31

Shiladittya Chakraborty

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I don't understand your idea? – spqa Oct 31 '15 at 10:27
This will tell the model to have 0 rows of data The model will fire the appropriate data change events to the table which will rebuild itself. – Shiladittya Chakraborty Oct 31 '15 at 11:28
(1+) for an easier way to remove all rows from the TableModel, although I don't think it will fix the Exception. – camickr Oct 31 '15 at 14:50

score 0 · Accepted Answer · answered Oct 31 '15 at 14:49

This don't happen when table don't have ListSelectionListener

So I'm guessing that your code to remove all the rows in the table executes. As the rows are removed the row selection must change since there are no longer any rows to select.

System.out.println(jTable1.getValueAt(jTable1.getSelectedRow(), 0));

Then the above statement is executed and the getSelectedRow() method return -1 which causes the Exception. Try:

int selectedRow = jTable1.getSelectedRow();
System.out.println("Selected Row: " + selectedRow;

if (selectedRow != -1)
    System.out.println(jTable1.getValueAt(selectedRow, 0));

Error when delete row from Jtable

2 Answers2