src/java.desktop/unix/classes/sun/awt/X11/XDnDDropTargetProtocol.java

@@ -618,11 +618,11 @@
             y = p.y;
         }
 
         /* Time stamp - new in XDnD version 1. */
         if (sourceProtocolVersion > 0) {
-            time_stamp = xclient.get_data(3);
+            time_stamp = xclient.get_data(3) & 0xFFFFFFFFL;
         }
 
         /* User action - new in XDnD version 2. */
         if (sourceProtocolVersion > 1) {
             xdnd_action = xclient.get_data(4);

@@ -865,11 +865,11 @@
          * The XDnD protocol recommends that the target requests the special
          * target DELETE in case if the drop action is XdndActionMove.
          */
         if (dropAction == DnDConstants.ACTION_MOVE && success) {
 
-            long time_stamp = xclient.get_data(2);
+            long time_stamp = xclient.get_data(2) & 0xFFFFFFFFL;
             long xdndSelectionAtom =
                 XDnDConstants.XDnDSelection.getSelectionAtom().getAtom();
 
             XToolkit.awtLock();
             try {