getCellIfPresent parameter check (#90)

FXMisc · May 25, 2021 · cfc3f62 · cfc3f62
1 parent 164e3d0
commit cfc3f62
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/main/java/org/fxmisc/flowless/CellListManager.java b/src/main/java/org/fxmisc/flowless/CellListManager.java
@@ -66,6 +66,9 @@ public C getPresentCell(int itemIndex) {
     }
 
     public Optional<C> getCellIfPresent(int itemIndex) {
+        if (itemIndex>=cells.size()||itemIndex<0) {
+           return Optional.empty();
+        }
         return cells.getIfMemoized(itemIndex); // getIfMemoized() may throw
     }