Java Utililty Methods Swing Focus

List of utility methods to do Swing Focus

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Description

The list of methods to do Swing Focus are organized into topic(s).

Method

voidrequestFocus(final JComponent comp)
Schedules a requestFocus() call in the AWT event queue. 
if (comp == null)
    return;
EventQueue.invokeLater(comp::requestFocus);
voidrequestFocus(final JComponent component)
request Focus 
SwingUtilities.invokeLater(new Runnable() {
    public void run() {
        component.requestFocus();
});
voidrequestFocus(final Window win, final Component comp)
Focuses on the specified component as soon as the window becomes active. 
win.addWindowListener(new WindowAdapter() {
    public void windowActivated(WindowEvent evt) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                comp.requestFocus();
        });
        win.removeWindowListener(this);
...
voidrequestFocusInWindow(final Component c)
Executes requestFocusInWindow on the specified component using invokeLater. 
invokeAndWait(new Runnable() {
    public void run() {
        c.requestFocusInWindow();
});
voidselectAllOnFocusGained()
select All On Focus Gained 
PropertyChangeListener listener = new PropertyChangeListener() {
    public void propertyChange(final PropertyChangeEvent e) {
        final Object value = e.getNewValue();
        if ((value instanceof JTextField) && !(value instanceof JPasswordField)) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    ((JTextField) value).selectAll();
            });
};
KeyboardFocusManager.getCurrentKeyboardFocusManager()
        .addPropertyChangeListener(PERMANENT_FOCUS_OWNER_PROPERTY_KEY, listener);
voidselectAndFocus(JComponent component)
Select all text in a text component and focus it. 
JTextComponent textComponent = null;
if (component instanceof JTextComponent) {
    textComponent = (JTextComponent) component;
if (component instanceof JComboBox) {
    Component editorComponent = ((JComboBox<?>) component).getEditor().getEditorComponent();
    if (editorComponent instanceof JTextComponent) {
        textComponent = (JTextComponent) editorComponent;
...
booleansetFocus(JComponent component)
set Focus 
if (component.requestFocusInWindow()) {
    if (component instanceof JSpinner)
        component = ((JSpinner) component).getEditor();
    if (component instanceof JTextComponent) {
        JTextComponent textComponent = (JTextComponent) component;
        textComponent.setCaretPosition(textComponent.getDocument().getLength());
    return true;
...
voidsetFocusableRecursively(final JComponent component, final boolean focusable, final boolean childsOnly)
Sets focusable state of component and all of its children. 
if (!childsOnly) {
    component.setFocusable(focusable);
for (int i = 0; i < component.getComponentCount(); i++) {
    if (component.getComponent(i) instanceof JComponent) {
        setFocusableRecursively((JComponent) component.getComponent(i), focusable, false);
voidsetFocusOn(Component component)
set Focus On 
final Component reference = component;
SwingUtilities.invokeLater(new Runnable() {
    public void run() {
        reference.requestFocus();
});
voidsetFocusOrder(JComponent... components)
set Focus Order 
for (int i = 0; i < components.length - 1; i++) {
    setNextFocusable(components[i], components[i + 1]);
setNextFocusable(components[components.length - 1], components[0]);