Luna Luna - 5 months ago 43
Java Question

JTable enter key

I am developing an application using

jTable
for inventory management.

The action is, by typing the item code in a
jTextField
and by pressing Enter key, the details of that code should come to
jTable
. And there I have to type the quantity and press Enter to calculate the amount. But now by giving item code the details come to the
jTable
, and I can type the quantity, but there by pressing Enter key
jTable
focus goes to the next row and no calculation is being done. But by again pressing Enter key on the
jTextField
the last entered amount is getting calculated. I don't know how to solve this problem as I am a beginner in Java. I am using MySQL and Java in Netbeans.

I am giving that code below..

Thank You..

jTable1.editCellAt(serialNumber, 2);
jTable1.getCellSelectionEnabled();

value1 = new Double(jTable1.getValueAt(serialNumber, 2).toString());
value = new Double(jTable1.getValueAt(serialNumber, 3).toString());
double result = value1 * value;

jTable1.setValueAt(result, serialNumber, 4);

Answer

The default Key Binding for Enter is the selectNextRowCell action in the table's WHEN_ANCESTOR_OF_FOCUSED_COMPONENT input map. You can substitute your own action, as outlined below.

private static final String solve = "Solve";
KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0);
table.getInputMap(JTable.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(enter, solve);
table.getActionMap().put(solve, new EnterAction());
...
private class EnterAction extends AbstractAction {

    @Override
    public void actionPerformed(ActionEvent e) {
        ...
    }
}

See also Keyboard Bindings in Swing (mirrored at web.archive.org).

Addendum: You can find more examples here, here and here; the last one is JTable specific.