src/share/classes/sun/awt/datatransfer/SunClipboard.java

*** 148,158 ****
      /**
       * @return the contents of this clipboard if it has been set from the same
       *         AppContext as it is currently retrieved or null otherwise
       * @since 1.5
       */
!     private synchronized Transferable getContextContents() {
          AppContext context = AppContext.getAppContext();
          return (context == contentsContext) ? contents : null;
      }
  
  
--- 148,158 ----
      /**
       * @return the contents of this clipboard if it has been set from the same
       *         AppContext as it is currently retrieved or null otherwise
       * @since 1.5
       */
!     protected synchronized Transferable getContextContents() {
          AppContext context = AppContext.getAppContext();
          return (context == contentsContext) ? contents : null;
      }
  
  
*** 279,290 ****
          final AppContext context = this.contentsContext;
          if (context == null) {
              return;
          }
  
!         final Runnable runnable = new Runnable() {
!                 public void run() {
                      final SunClipboard sunClipboard = SunClipboard.this;
                      ClipboardOwner owner = null;
                      Transferable contents = null;
  
                      synchronized (sunClipboard) {
--- 279,293 ----
          final AppContext context = this.contentsContext;
          if (context == null) {
              return;
          }
  
!         SunToolkit.postEvent(context, new PeerEvent(this, () -> lostOwnershipNow(disposedContext),
!                                                     PeerEvent.PRIORITY_EVENT));
!     }
! 
!     protected void lostOwnershipNow(final AppContext disposedContext) {
          final SunClipboard sunClipboard = SunClipboard.this;
          ClipboardOwner owner = null;
          Transferable contents = null;
  
          synchronized (sunClipboard) {
*** 309,323 ****
                      }
                      if (owner != null) {
                          owner.lostOwnership(sunClipboard, contents);
                      }
                  }
-             };
  
-         SunToolkit.postEvent(context, new PeerEvent(this, runnable,
-                                                     PeerEvent.PRIORITY_EVENT));
-     }
  
      protected abstract void clearNativeContext();
  
      protected abstract void setContentsNative(Transferable contents);
  
--- 312,322 ----