/* - */
void jButton4_actionPerformed(ActionEvent e) {
int rowSelected = jTable1.getSelectedRow();
if (rowSelected != -1) {
MyTableModel tm = (MyTableModel) jTable1.getModel();
data = tm.removeRow(rowSelected);
}
}
/* + */
void jButton3_actionPerformed(ActionEvent e) {
// Add a row to the table
MyTableModel tm = (MyTableModel) jTable1.getModel();
data = tm.insertRow();
}