src/java.desktop/share/classes/javax/swing/plaf/basic/BasicSplitPaneUI.java

@@ -1189,10 +1189,11 @@
 
     /**
      * Should be messaged before the dragging session starts, resets
      * lastDragLocation and dividerSize.
      */
+    @SuppressWarnings("deprecation")
     protected void startDragging() {
         Component       leftC = splitPane.getLeftComponent();
         Component       rightC = splitPane.getRightComponent();
         ComponentPeer   cPeer;