src/java.desktop/windows/classes/sun/awt/windows/WScrollPanePeer.java

@@ -105,12 +105,14 @@
      * information from the java-level is passed down and used.
      */
     @Override
     public void childResized(int width, int height) {
         ScrollPane sp = (ScrollPane)target;
+        if(sp.getScrollbarDisplayPolicy() != ScrollPane.SCROLLBARS_NEVER) {
         Dimension vs = sp.getSize();
         setSpans(vs.width, vs.height, width, height);
+        }
         setInsets();
     }
 
     synchronized native void setSpans(int viewWidth, int viewHeight,
                                       int childWidth, int childHeight);