--- old/src/java.desktop/share/classes/javax/swing/DefaultListSelectionModel.java	2017-11-01 10:22:24.952626498 -0700
+++ new/src/java.desktop/share/classes/javax/swing/DefaultListSelectionModel.java	2017-11-01 10:22:24.816626501 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -95,7 +95,6 @@
      * @throws IllegalArgumentException {@inheritDoc}
      */
     public void setSelectionMode(int selectionMode) {
-        int oldMode = this.selectionMode;
         switch (selectionMode) {
         case SINGLE_SELECTION:
         case SINGLE_INTERVAL_SELECTION:
@@ -105,24 +104,6 @@
         default:
             throw new IllegalArgumentException("invalid selectionMode");
         }
-
-        /*
-        This code will only be executed when selection needs to be updated on
-        changing selection mode. It will happen only if selection mode is changed
-        from MULTIPLE_INTERVAL to SINGLE_INTERVAL or SINGLE or from
-        SINGLE_INTERVAL to SINGLE
-         */
-        if (oldMode > this.selectionMode) {
-            if (this.selectionMode == SINGLE_SELECTION) {
-                setSelectionInterval(minIndex, minIndex);
-            } else if (this.selectionMode == SINGLE_INTERVAL_SELECTION) {
-                int selectionEndindex = minIndex;
-                while (value.get(selectionEndindex+1)) {
-                    selectionEndindex++;
-                }
-                setSelectionInterval(minIndex, selectionEndindex);
-            }
-        }
     }
 
     /** {@inheritDoc} */