void clearMarkers() 
{
        synchronized(this) {
            typeAheadMarkers.clear();
        }
}

Clears markers queue

 protected synchronized  void dequeueKeyEvents(long after,
    Component untilFocused) 
{
        if (untilFocused == null) {
            return;
        }
        focusLog.log(Level.FINER, "Dequeue at {0} for {1}",
                     new Object[] {after, untilFocused});
        TypeAheadMarker marker;
        ListIterator iter = typeAheadMarkers.listIterator
            ((after  >= 0) ? typeAheadMarkers.size() : 0);
        if (after <  0) {
            while (iter.hasNext()) {
                marker = (TypeAheadMarker)iter.next();
                if (marker.untilFocused == untilFocused)
                {
                    iter.remove();
                    return;
                }
            }
        } else {
            while (iter.hasPrevious()) {
                marker = (TypeAheadMarker)iter.previous();
                if (marker.untilFocused == untilFocused &&
                    marker.after == after)
                {
                    iter.remove();
                    return;
                }
            }
        }
}

Releases for normal dispatching to the current focus owner all KeyEvents which were enqueued because of a call to enqueueKeyEvents with the same timestamp and Component. If the given timestamp is less than zero, the outstanding enqueue request for the given Component with the oldest timestamp (if any) should be cancelled.

 protected synchronized  void discardKeyEvents(Component comp) 
{
        if (comp == null) {
            return;
        }
        long start = -1;
        for (Iterator iter = typeAheadMarkers.iterator(); iter.hasNext(); ) {
            TypeAheadMarker marker = (TypeAheadMarker)iter.next();
            Component toTest = marker.untilFocused;
            boolean match = (toTest == comp);
            while (!match && toTest != null && !(toTest instanceof Window)) {
                toTest = toTest.getParent();
                match = (toTest == comp);
            }
            if (match) {
                if (start <  0) {
                    start = marker.after;
                }
                iter.remove();
            } else if (start  >= 0) {
                purgeStampedEvents(start, marker.after);
                start = -1;
            }
        }
        purgeStampedEvents(start, -1);
}

Discards all KeyEvents which were enqueued because of one or more calls to enqueueKeyEvents with the specified Component, or one of its descendants.

 public boolean dispatchEvent(AWTEvent e) 
{
        if (focusLog.isLoggable(Level.FINE) && (e instanceof WindowEvent || e instanceof FocusEvent)) focusLog.fine("" + e);
        switch (e.getID()) {
            case WindowEvent.WINDOW_GAINED_FOCUS: {
                WindowEvent we = (WindowEvent)e;
                Window oldFocusedWindow = getGlobalFocusedWindow();
                Window newFocusedWindow = we.getWindow();
                if (newFocusedWindow == oldFocusedWindow) {
                    break;
                }
                if (!(newFocusedWindow.isFocusableWindow()
                      && newFocusedWindow.isVisible()
                      && newFocusedWindow.isDisplayable()))
                {
                    // we can not accept focus on such window, so reject it.
                    restoreFocus(we);
                    break;
                }
                // If there exists a current focused window, then notify it
                // that it has lost focus.
                if (oldFocusedWindow != null) {
                    boolean isEventDispatched =
                        sendMessage(oldFocusedWindow,
                                new WindowEvent(oldFocusedWindow,
                                                WindowEvent.WINDOW_LOST_FOCUS,
                                                newFocusedWindow));
                    // Failed to dispatch, clear by ourselfves
                    if (!isEventDispatched) {
                        setGlobalFocusOwner(null);
                        setGlobalFocusedWindow(null);
                    }
                }
                // Because the native libraries do not post WINDOW_ACTIVATED
                // events, we need to synthesize one if the active Window
                // changed.
                Window newActiveWindow =
                    getOwningFrameDialog(newFocusedWindow);
                Window currentActiveWindow = getGlobalActiveWindow();
                if (newActiveWindow != currentActiveWindow) {
                    sendMessage(newActiveWindow,
                                new WindowEvent(newActiveWindow,
                                                WindowEvent.WINDOW_ACTIVATED,
                                                currentActiveWindow));
                    if (newActiveWindow != getGlobalActiveWindow()) {
                        // Activation change was rejected. Unlikely, but
                        // possible.
                        restoreFocus(we);
                        break;
                    }
                }
                setGlobalFocusedWindow(newFocusedWindow);
                if (newFocusedWindow != getGlobalFocusedWindow()) {
                    // Focus change was rejected. Will happen if
                    // newFocusedWindow is not a focusable Window.
                    restoreFocus(we);
                    break;
                }
                // Restore focus to the Component which last held it. We do
                // this here so that client code can override our choice in
                // a WINDOW_GAINED_FOCUS handler.
                //
                // Make sure that the focus change request doesn't change the
                // focused Window in case we are no longer the focused Window
                // when the request is handled.
                if (inSendMessage == 0) {
                    // Identify which Component should initially gain focus
                    // in the Window.
                    //
                    // * If we're in SendMessage, then this is a synthetic
                    //   WINDOW_GAINED_FOCUS message which was generated by a
                    //   the FOCUS_GAINED handler. Allow the Component to
                    //   which the FOCUS_GAINED message was targeted to
                    //   receive the focus.
                    // * Otherwise, look up the correct Component here.
                    //   We don't use Window.getMostRecentFocusOwner because
                    //   window is focused now and 'null' will be returned
                    // Calculating of most recent focus owner and focus
                    // request should be synchronized on KeyboardFocusManager.class
                    // to prevent from thread race when user will request
                    // focus between calculation and our request.
                    // But if focus transfer is synchronous, this synchronization
                    // may cause deadlock, thus we don't synchronize this block.
                    Component toFocus = KeyboardFocusManager.
                        getMostRecentFocusOwner(newFocusedWindow);
                    if ((toFocus == null) &&
                        newFocusedWindow.isFocusableWindow())
                    {
                        toFocus = newFocusedWindow.getFocusTraversalPolicy().
                            getInitialComponent(newFocusedWindow);
                    }
                    Component tempLost = null;
                    synchronized(KeyboardFocusManager.class) {
                        tempLost = newFocusedWindow.setTemporaryLostComponent(null);
                    }
                    // The component which last has the focus when this window was focused
                    // should receive focus first
                    if (focusLog.isLoggable(Level.FINER)) {
                        focusLog.log(Level.FINER, "tempLost {0}, toFocus {1}",
                                     new Object[]{tempLost, toFocus});
                    }
                    if (tempLost != null) {
                        tempLost.requestFocusInWindow(CausedFocusEvent.Cause.ACTIVATION);
                    }
                    if (toFocus != null && toFocus != tempLost) {
                        // If there is a component which requested focus when this window
                        // was inactive it expects to receive focus after activation.
                        toFocus.requestFocusInWindow(CausedFocusEvent.Cause.ACTIVATION);
                    }
                }
                Window realOppositeWindow = this.realOppositeWindowWR.get();
                if (realOppositeWindow != we.getOppositeWindow()) {
                    we = new WindowEvent(newFocusedWindow,
                                         WindowEvent.WINDOW_GAINED_FOCUS,
                                         realOppositeWindow);
                }
                return typeAheadAssertions(newFocusedWindow, we);
            }
            case WindowEvent.WINDOW_ACTIVATED: {
                WindowEvent we = (WindowEvent)e;
                Window oldActiveWindow = getGlobalActiveWindow();
                Window newActiveWindow = we.getWindow();
                if (oldActiveWindow == newActiveWindow) {
                    break;
                }
                // If there exists a current active window, then notify it that
                // it has lost activation.
                if (oldActiveWindow != null) {
                    boolean isEventDispatched =
                        sendMessage(oldActiveWindow,
                                new WindowEvent(oldActiveWindow,
                                                WindowEvent.WINDOW_DEACTIVATED,
                                                newActiveWindow));
                    // Failed to dispatch, clear by ourselfves
                    if (!isEventDispatched) {
                        setGlobalActiveWindow(null);
                    }
                    if (getGlobalActiveWindow() != null) {
                        // Activation change was rejected. Unlikely, but
                        // possible.
                        break;
                    }
                }
                setGlobalActiveWindow(newActiveWindow);
                if (newActiveWindow != getGlobalActiveWindow()) {
                    // Activation change was rejected. Unlikely, but
                    // possible.
                    break;
                }
                return typeAheadAssertions(newActiveWindow, we);
            }
            case FocusEvent.FOCUS_GAINED: {
                FocusEvent fe = (FocusEvent)e;
                CausedFocusEvent.Cause cause = (fe instanceof CausedFocusEvent) ?
                    ((CausedFocusEvent)fe).getCause() : CausedFocusEvent.Cause.UNKNOWN;
                Component oldFocusOwner = getGlobalFocusOwner();
                Component newFocusOwner = fe.getComponent();
                if (oldFocusOwner == newFocusOwner) {
                    if (focusLog.isLoggable(Level.FINE)) {
                        focusLog.log(Level.FINE, "Skipping {0} because focus owner is the same", new Object[] {e});
                    }
                    // We can't just drop the event - there could be
                    // type-ahead markers associated with it.
                    dequeueKeyEvents(-1, newFocusOwner);
                    break;
                }
                // If there exists a current focus owner, then notify it that
                // it has lost focus.
                if (oldFocusOwner != null) {
                    boolean isEventDispatched =
                        sendMessage(oldFocusOwner,
                                    new CausedFocusEvent(oldFocusOwner,
                                                   FocusEvent.FOCUS_LOST,
                                                   fe.isTemporary(),
                                                   newFocusOwner, cause));
                    // Failed to dispatch, clear by ourselfves
                    if (!isEventDispatched) {
                        setGlobalFocusOwner(null);
                        if (!fe.isTemporary()) {
                            setGlobalPermanentFocusOwner(null);
                        }
                    }
                }
                // Because the native windowing system has a different notion
                // of the current focus and activation states, it is possible
                // that a Component outside of the focused Window receives a
                // FOCUS_GAINED event. We synthesize a WINDOW_GAINED_FOCUS
                // event in that case.
                final Window newFocusedWindow = Component.getContainingWindow(newFocusOwner);
                final Window currentFocusedWindow = getGlobalFocusedWindow();
                if (newFocusedWindow != null &&
                    newFocusedWindow != currentFocusedWindow)
                {
                    sendMessage(newFocusedWindow,
                                new WindowEvent(newFocusedWindow,
                                        WindowEvent.WINDOW_GAINED_FOCUS,
                                                currentFocusedWindow));
                    if (newFocusedWindow != getGlobalFocusedWindow()) {
                        // Focus change was rejected. Will happen if
                        // newFocusedWindow is not a focusable Window.
                        // Need to recover type-ahead, but don't bother
                        // restoring focus. That was done by the
                        // WINDOW_GAINED_FOCUS handler
                        dequeueKeyEvents(-1, newFocusOwner);
                        break;
                    }
                }
                if (!(newFocusOwner.isFocusable() && newFocusOwner.isEnabled()
                      && newFocusOwner.isShowing()))
                {
                    // we should not accept focus on such component, so reject it.
                    dequeueKeyEvents(-1, newFocusOwner);
                    if (KeyboardFocusManager.isAutoFocusTransferEnabled()) {
                        // If FOCUS_GAINED is for a disposed component (however
                        // it shouldn't happen) its toplevel parent is null. In this
                        // case we have to try to restore focus in the current focused
                        // window (for the details: 6607170).
                        if (newFocusedWindow == null) {
                            restoreFocus(fe, currentFocusedWindow);
                        } else {
                            restoreFocus(fe, newFocusedWindow);
                        }
                    }
                    break;
                }
                setGlobalFocusOwner(newFocusOwner);
                if (newFocusOwner != getGlobalFocusOwner()) {
                    // Focus change was rejected. Will happen if
                    // newFocusOwner is not focus traversable.
                    dequeueKeyEvents(-1, newFocusOwner);
                    if (KeyboardFocusManager.isAutoFocusTransferEnabled()) {
                        restoreFocus(fe, (Window)newFocusedWindow);
                    }
                    break;
                }
                if (!fe.isTemporary()) {
                    setGlobalPermanentFocusOwner(newFocusOwner);
                    if (newFocusOwner != getGlobalPermanentFocusOwner()) {
                        // Focus change was rejected. Unlikely, but possible.
                        dequeueKeyEvents(-1, newFocusOwner);
                        if (KeyboardFocusManager.isAutoFocusTransferEnabled()) {
                            restoreFocus(fe, (Window)newFocusedWindow);
                        }
                        break;
                    }
                }
                setNativeFocusOwner(getHeavyweight(newFocusOwner));
                Component realOppositeComponent = this.realOppositeComponentWR.get();
                if (realOppositeComponent != null &&
                    realOppositeComponent != fe.getOppositeComponent()) {
                    fe = new CausedFocusEvent(newFocusOwner,
                                        FocusEvent.FOCUS_GAINED,
                                        fe.isTemporary(),
                                        realOppositeComponent, cause);
                    ((AWTEvent) fe).isPosted = true;
                }
                return typeAheadAssertions(newFocusOwner, fe);
            }
            case FocusEvent.FOCUS_LOST: {
                FocusEvent fe = (FocusEvent)e;
                Component currentFocusOwner = getGlobalFocusOwner();
                if (currentFocusOwner == null) {
                    if (focusLog.isLoggable(Level.FINE)) focusLog.log(Level.FINE, "Skipping {0} because focus owner is null",
                                                                        new Object[] {e});
                    break;
                }
                // Ignore cases where a Component loses focus to itself.
                // If we make a mistake because of retargeting, then the
                // FOCUS_GAINED handler will correct it.
                if (currentFocusOwner == fe.getOppositeComponent()) {
                    if (focusLog.isLoggable(Level.FINE)) focusLog.log(Level.FINE, "Skipping {0} because current focus owner is equal to opposite",
                                                                      new Object[] {e});
                    break;
                }
                setGlobalFocusOwner(null);
                if (getGlobalFocusOwner() != null) {
                    // Focus change was rejected. Unlikely, but possible.
                    restoreFocus(currentFocusOwner, true);
                    break;
                }
                if (!fe.isTemporary()) {
                    setGlobalPermanentFocusOwner(null);
                    if (getGlobalPermanentFocusOwner() != null) {
                        // Focus change was rejected. Unlikely, but possible.
                        restoreFocus(currentFocusOwner, true);
                        break;
                    }
                } else {
                    Window owningWindow = currentFocusOwner.getContainingWindow();
                    if (owningWindow != null) {
                        owningWindow.setTemporaryLostComponent(currentFocusOwner);
                    }
                }
                setNativeFocusOwner(null);
                fe.setSource(currentFocusOwner);
                realOppositeComponentWR = (fe.getOppositeComponent() != null)
                    ? new WeakReference< Component >(currentFocusOwner)
                    : NULL_COMPONENT_WR;
                return typeAheadAssertions(currentFocusOwner, fe);
            }
            case WindowEvent.WINDOW_DEACTIVATED: {
                WindowEvent we = (WindowEvent)e;
                Window currentActiveWindow = getGlobalActiveWindow();
                if (currentActiveWindow == null) {
                    break;
                }
                if (currentActiveWindow != e.getSource()) {
                    // The event is lost in time.
                    // Allow listeners to precess the event but do not
                    // change any global states
                    break;
                }
                setGlobalActiveWindow(null);
                if (getGlobalActiveWindow() != null) {
                    // Activation change was rejected. Unlikely, but possible.
                    break;
                }
                we.setSource(currentActiveWindow);
                return typeAheadAssertions(currentActiveWindow, we);
            }
            case WindowEvent.WINDOW_LOST_FOCUS: {
                WindowEvent we = (WindowEvent)e;
                Window currentFocusedWindow = getGlobalFocusedWindow();
                Window losingFocusWindow = we.getWindow();
                Window activeWindow = getGlobalActiveWindow();
                Window oppositeWindow = we.getOppositeWindow();
                if (focusLog.isLoggable(Level.FINE)) focusLog.log(Level.FINE, "Active {0}, Current focused {1}, losing focus {2} opposite {3}",
                                                                  new Object[] {activeWindow, currentFocusedWindow,
                                                                                losingFocusWindow, oppositeWindow});
                if (currentFocusedWindow == null) {
                    break;
                }
                // Special case -- if the native windowing system posts an
                // event claiming that the active Window has lost focus to the
                // focused Window, then discard the event. This is an artifact
                // of the native windowing system not knowing which Window is
                // really focused.
                if (inSendMessage == 0 && losingFocusWindow == activeWindow &&
                    oppositeWindow == currentFocusedWindow)
                {
                    break;
                }
                Component currentFocusOwner = getGlobalFocusOwner();
                if (currentFocusOwner != null) {
                    // The focus owner should always receive a FOCUS_LOST event
                    // before the Window is defocused.
                    Component oppositeComp = null;
                    if (oppositeWindow != null) {
                        oppositeComp = oppositeWindow.getTemporaryLostComponent();
                        if (oppositeComp == null) {
                            oppositeComp = oppositeWindow.getMostRecentFocusOwner();
                        }
                    }
                    if (oppositeComp == null) {
                        oppositeComp = oppositeWindow;
                    }
                    sendMessage(currentFocusOwner,
                                new CausedFocusEvent(currentFocusOwner,
                                               FocusEvent.FOCUS_LOST,
                                               true,
                                               oppositeComp, CausedFocusEvent.Cause.ACTIVATION));
                }
                setGlobalFocusedWindow(null);
                if (getGlobalFocusedWindow() != null) {
                    // Focus change was rejected. Unlikely, but possible.
                    restoreFocus(currentFocusedWindow, null, true);
                    break;
                }
                we.setSource(currentFocusedWindow);
                realOppositeWindowWR = (oppositeWindow != null)
                    ? new WeakReference< Window >(currentFocusedWindow)
                    : NULL_WINDOW_WR;
                typeAheadAssertions(currentFocusedWindow, we);
                if (oppositeWindow == null) {
                    // Then we need to deactive the active Window as well.
                    // No need to synthesize in other cases, because
                    // WINDOW_ACTIVATED will handle it if necessary.
                    sendMessage(activeWindow,
                                new WindowEvent(activeWindow,
                                                WindowEvent.WINDOW_DEACTIVATED,
                                                null));
                    if (getGlobalActiveWindow() != null) {
                        // Activation change was rejected. Unlikely,
                        // but possible.
                        restoreFocus(currentFocusedWindow, null, true);
                    }
                }
                break;
            }
            case KeyEvent.KEY_TYPED:
            case KeyEvent.KEY_PRESSED:
            case KeyEvent.KEY_RELEASED:
                return typeAheadAssertions(null, e);
            default:
                return false;
        }
        return true;
}

This method is called by the AWT event dispatcher requesting that the current KeyboardFocusManager dispatch the specified event on its behalf. DefaultKeyboardFocusManagers dispatch all FocusEvents, all WindowEvents related to focus, and all KeyEvents. These events are dispatched based on the KeyboardFocusManager's notion of the focus owner and the focused and active Windows, sometimes overriding the source of the specified AWTEvent. If this method returns false, then the AWT event dispatcher will attempt to dispatch the event itself.

 public boolean dispatchKeyEvent(KeyEvent e) 
{
        Component focusOwner = (((AWTEvent)e).isPosted) ? getFocusOwner() : e.getComponent();
        if (focusOwner != null && focusOwner.isShowing() &&
            focusOwner.isFocusable() && focusOwner.isEnabled()) {
            if (!e.isConsumed()) {
                Component comp = e.getComponent();
                if (comp != null && comp.isEnabled()) {
                    redispatchEvent(comp, e);
                }
            }
        }
        boolean stopPostProcessing = false;
        java.util.List processors = getKeyEventPostProcessors();
        if (processors != null) {
            for (java.util.Iterator iter = processors.iterator();
                 !stopPostProcessing && iter.hasNext(); )
            {
                stopPostProcessing = (((KeyEventPostProcessor)(iter.next())).
                            postProcessKeyEvent(e));
            }
        }
        if (!stopPostProcessing) {
            postProcessKeyEvent(e);
        }
        // Allow the peer to process KeyEvent
        Component source = e.getComponent();
        ComponentPeer peer = source.getPeer();
        if (peer == null || peer instanceof LightweightPeer) {
            // if focus owner is lightweight then its native container
            // processes event
            Container target = source.getNativeContainer();
            if (target != null) {
                peer = target.getPeer();
            }
        }
        if (peer != null) {
            peer.handleEvent(e);
        }
        return true;
}

Called by dispatchEvent if no other KeyEventDispatcher in the dispatcher chain dispatched the KeyEvent, or if no other KeyEventDispatchers are registered. If the event has not been consumed, its target is enabled, and the focus owner is not null, this method dispatches the event to its target. This method will also subsequently dispatch the event to all registered KeyEventPostProcessors. After all this operations are finished, the event is passed to peers for processing.

In all cases, this method returns true, since DefaultKeyboardFocusManager is designed so that neither dispatchEvent, nor the AWT event dispatcher, should take further action on the event in any situation.

 public  void downFocusCycle(Container aContainer) 
{
        if (aContainer != null && aContainer.isFocusCycleRoot()) {
            aContainer.transferFocusDownCycle();
        }
}

Moves the focus down one focus traversal cycle. If aContainer is a focus cycle root, then the focus owner is set to aContainer's default Component to focus, and the current focus cycle root is set to aContainer. If aContainer is not a focus cycle root, then no focus traversal operation occurs.

  void dumpMarkers() 
{
        if (focusLog.isLoggable(Level.FINEST)) {
            focusLog.log(Level.FINEST, " > > > Markers dump, time: {0}", System.currentTimeMillis());
            synchronized (this) {
                if (typeAheadMarkers.size() != 0) {
                    Iterator iter = typeAheadMarkers.iterator();
                    while (iter.hasNext()) {
                        TypeAheadMarker marker = (TypeAheadMarker)iter.next();
                        focusLog.log(Level.FINEST, "    {0}", marker);
                    }
                }
            }
        }
}

Dumps the list of type-ahead queue markers to stderr

 protected synchronized  void enqueueKeyEvents(long after,
    Component untilFocused) 
{
        if (untilFocused == null) {
            return;
        }
        focusLog.log(Level.FINER, "Enqueue at {0} for {1}",
                     new Object[] {after, untilFocused});
        int insertionIndex = 0,
            i = typeAheadMarkers.size();
        ListIterator iter = typeAheadMarkers.listIterator(i);
        for (; i  > 0; i--) {
            TypeAheadMarker marker = (TypeAheadMarker)iter.previous();
            if (marker.after < = after) {
                insertionIndex = i;
                break;
            }
        }
        typeAheadMarkers.add(insertionIndex,
                             new TypeAheadMarker(after, untilFocused));
}

Delays dispatching of KeyEvents until the specified Component becomes the focus owner. KeyEvents with timestamps later than the specified timestamp will be enqueued until the specified Component receives a FOCUS_GAINED event, or the AWT cancels the delay request by invoking dequeueKeyEvents or discardKeyEvents.

 public  void focusNextComponent(Component aComponent) 
{
        if (aComponent != null) {
            aComponent.transferFocus();
        }
}

Focuses the Component after aComponent, typically based on a FocusTraversalPolicy.

 public  void focusPreviousComponent(Component aComponent) 
{
        if (aComponent != null) {
            aComponent.transferFocusBackward();
        }
}

Focuses the Component before aComponent, typically based on a FocusTraversalPolicy.

 public boolean postProcessKeyEvent(KeyEvent e) 
{
        if (!e.isConsumed()) {
            Component target = e.getComponent();
            Container p = (Container)
                (target instanceof Container ? target : target.getParent());
            if (p != null) {
                p.postProcessKeyEvent(e);
            }
        }
        return true;
}

This method will be called by dispatchKeyEvent. It will handle any unconsumed KeyEvents that map to an AWT MenuShortcut by consuming the event and activating the shortcut.

 public  void processKeyEvent(Component focusedComponent,
    KeyEvent e) 
{
        // consume processed event if needed
        if (consumeProcessedKeyEvent(e)) {
            return;
        }
        // KEY_TYPED events cannot be focus traversal keys
        if (e.getID() == KeyEvent.KEY_TYPED) {
            return;
        }
        if (focusedComponent.getFocusTraversalKeysEnabled() &&
            !e.isConsumed())
        {
            AWTKeyStroke stroke = AWTKeyStroke.getAWTKeyStrokeForEvent(e),
                oppStroke = AWTKeyStroke.getAWTKeyStroke(stroke.getKeyCode(),
                                                 stroke.getModifiers(),
                                                 !stroke.isOnKeyRelease());
            Set toTest;
            boolean contains, containsOpp;
            toTest = focusedComponent.getFocusTraversalKeys(
                KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS);
            contains = toTest.contains(stroke);
            containsOpp = toTest.contains(oppStroke);
            if (contains || containsOpp) {
                consumeTraversalKey(e);
                if (contains) {
                    focusNextComponent(focusedComponent);
                }
                return;
            } else if (e.getID() == KeyEvent.KEY_PRESSED) {
                // Fix for 6637607: consumeNextKeyTyped should be reset.
                consumeNextKeyTyped = false;
            }
            toTest = focusedComponent.getFocusTraversalKeys(
                KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS);
            contains = toTest.contains(stroke);
            containsOpp = toTest.contains(oppStroke);
            if (contains || containsOpp) {
                consumeTraversalKey(e);
                if (contains) {
                    focusPreviousComponent(focusedComponent);
                }
                return;
            }
            toTest = focusedComponent.getFocusTraversalKeys(
                KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS);
            contains = toTest.contains(stroke);
            containsOpp = toTest.contains(oppStroke);
            if (contains || containsOpp) {
                consumeTraversalKey(e);
                if (contains) {
                    upFocusCycle(focusedComponent);
                }
                return;
            }
            if (!((focusedComponent instanceof Container) &&
                  ((Container)focusedComponent).isFocusCycleRoot())) {
                return;
            }
            toTest = focusedComponent.getFocusTraversalKeys(
                KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS);
            contains = toTest.contains(stroke);
            containsOpp = toTest.contains(oppStroke);
            if (contains || containsOpp) {
                consumeTraversalKey(e);
                if (contains) {
                    downFocusCycle((Container)focusedComponent);
                }
            }
        }
}

This method initiates a focus traversal operation if and only if the KeyEvent represents a focus traversal key for the specified focusedComponent. It is expected that focusedComponent is the current focus owner, although this need not be the case. If it is not, focus traversal will nevertheless proceed as if focusedComponent were the focus owner.

 static boolean sendMessage(Component target,
    AWTEvent e) 
{
        e.isPosted = true;
        AppContext myAppContext = AppContext.getAppContext();
        final AppContext targetAppContext = target.appContext;
        final SentEvent se =
            new DefaultKeyboardFocusManagerSentEvent(e, myAppContext);
        if (myAppContext == targetAppContext) {
            se.dispatch();
        } else {
            if (targetAppContext.isDisposed()) {
                return false;
            }
            SunToolkit.postEvent(targetAppContext, se);
            if (EventQueue.isDispatchThread()) {
                EventDispatchThread edt = (EventDispatchThread)
                    Thread.currentThread();
                edt.pumpEvents(SentEvent.ID, new Conditional() {
                        public boolean evaluate() {
                            return !se.dispatched && !targetAppContext.isDisposed();
                        }
                    });
            } else {
                synchronized (se) {
                    while (!se.dispatched && !targetAppContext.isDisposed()) {
                        try {
                            se.wait(1000);
                        } catch (InterruptedException ie) {
                            break;
                        }
                    }
                }
            }
        }
        return se.dispatched;
}

Sends a synthetic AWTEvent to a Component. If the Component is in the current AppContext, then the event is immediately dispatched. If the Component is in a different AppContext, then the event is posted to the other AppContext's EventQueue, and this method blocks until the event is handled or target AppContext is disposed. Returns true if successfuly dispatched event, false if failed to dispatch.

 public  void upFocusCycle(Component aComponent) 
{
        if (aComponent != null) {
            aComponent.transferFocusUpCycle();
        }
}

Moves the focus up one focus traversal cycle. Typically, the focus owner is set to aComponent's focus cycle root, and the current focus cycle root is set to the new focus owner's focus cycle root. If, however, aComponent's focus cycle root is a Window, then the focus owner is set to the focus cycle root's default Component to focus, and the current focus cycle root is unchanged.