java - Change focus to next component in JTable using TAB

Question

JTable's default behavior is changing focus to next cell and I want to force it to move focus to next component (e.g. JTextField) on TAB key pressed.
I overrided isCellEditable method of DefaultTableModel to always return false:

public boolean isCellEditable(int rowIndex, int columnIndex) {
    return false;
}

But it still doesn't change focus to next component!
How should I make JTable change focus to next component instead of next cell?

Answer 1

The shift-/tab keys are used by default for transfering focus between components. JTable explicitly requests to handle the shift-/tab internally (by providing sets of focusTraversalKeys which doesn't include those).

Following the general rule (if there's specilized api available for a task, use that instead of rolling your own), the solution is to set traversal keys to again contain them:

Set<AWTKeyStroke> forward = new HashSet<AWTKeyStroke>(
        table.getFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS));
forward.add(KeyStroke.getKeyStroke("TAB"));
table.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, forward);
Set<AWTKeyStroke> backward = new HashSet<AWTKeyStroke>(
        table.getFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS));
backward.add(KeyStroke.getKeyStroke("shift TAB"));
table.setFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, backward);