src/java.desktop/share/classes/javax/swing/ScrollPaneLayout.java

*** 819,828 ****
--- 819,831 ----
           * space for it (we'll make it visible later). A vertical
           * scrollbar is considered to be fixed width, arbitrary height.
           */
  
          Rectangle vsbR = new Rectangle(0, availR.y - vpbInsets.top, 0, 0);
+         if(scrollPane.getClientProperty("ScrollPaneLayout.vsbAtTop") != null) {
+             vsbR.y = 0;
+         }
  
          boolean vsbNeeded;
          if (vsbPolicy == VERTICAL_SCROLLBAR_ALWAYS) {
              vsbNeeded = true;
          }
*** 947,956 ****
--- 950,963 ----
          rowHeadR.height = availR.height + vpbInsets.top + vpbInsets.bottom;
          rowHeadR.y = availR.y - vpbInsets.top;
          colHeadR.width = availR.width + vpbInsets.left + vpbInsets.right;
          colHeadR.x = availR.x - vpbInsets.left;
          
+         if(scrollPane.getClientProperty("ScrollPaneLayout.vsbAtTop") != null) {
+             vsbR.height += colHeadR.height;
+         }
+ 
          /* Set the bounds of the remaining components.  The scrollbars
           * are made invisible if they're not needed.
           */
  
          if (rowHead != null) {