src/share/classes/java/awt/DefaultKeyboardFocusManager.java

rev 13428 : 8211435: Exception in thread "AWT-EventQueue-1" java.lang.IllegalArgumentException: null source
Reviewed-by: dmarkov, lbourges, kaddepalli, prr

*** 28,49 ****
  import java.awt.event.KeyEvent;
  import java.awt.event.WindowEvent;
  import java.awt.peer.ComponentPeer;
  import java.awt.peer.LightweightPeer;
  import java.lang.ref.WeakReference;
- import java.util.LinkedList;
  import java.util.Iterator;
  import java.util.ListIterator;
  import java.util.Set;
  
- import sun.util.logging.PlatformLogger;
- 
- import sun.awt.AppContext;
- import sun.awt.SunToolkit;
  import sun.awt.AWTAccessor;
  import sun.awt.CausedFocusEvent;
  import sun.awt.TimedWindowEvent;
  
  /**
   * The default KeyboardFocusManager for AWT applications. Focus traversal is
   * done in response to a Component's focus traversal keys, and using a
   * Container's FocusTraversalPolicy.
--- 28,48 ----
  import java.awt.event.KeyEvent;
  import java.awt.event.WindowEvent;
  import java.awt.peer.ComponentPeer;
  import java.awt.peer.LightweightPeer;
  import java.lang.ref.WeakReference;
  import java.util.Iterator;
+ import java.util.LinkedList;
  import java.util.ListIterator;
  import java.util.Set;
  
  import sun.awt.AWTAccessor;
+ import sun.awt.AppContext;
  import sun.awt.CausedFocusEvent;
+ import sun.awt.SunToolkit;
  import sun.awt.TimedWindowEvent;
+ import sun.util.logging.PlatformLogger;
  
  /**
   * The default KeyboardFocusManager for AWT applications. Focus traversal is
   * done in response to a Component's focus traversal keys, and using a
   * Container's FocusTraversalPolicy.
*** 775,785 ****
                  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,
--- 774,784 ----
                  realOppositeWindowWR = (oppositeWindow != null)
                      ? new WeakReference<Window>(currentFocusedWindow)
                      : NULL_WINDOW_WR;
                  typeAheadAssertions(currentFocusedWindow, we);
  
!                 if (oppositeWindow == null && activeWindow != 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,