JAL-2759 First pass instantiate hiddenColumns collection in constructor

[jalview.git] / src / jalview / datamodel / HiddenColsIterator.java

diff --git a/src/jalview/datamodel/HiddenColsIterator.java b/src/jalview/datamodel/HiddenColsIterator.java
index 610445c..55a3d8b 100644 (file)
--- a/src/jalview/datamodel/HiddenColsIterator.java
+++ b/src/jalview/datamodel/HiddenColsIterator.java
@@ -25,7 +25,7 @@ public class HiddenColsIterator implements Iterator<int[]>
    */
   HiddenColsIterator(List<int[]> hiddenColumns)
   {
-    if (hiddenColumns != null)
+    if (!hiddenColumns.isEmpty())
     {
       int last = hiddenColumns.get(hiddenColumns.size() - 1)[1];
       init(0, last, hiddenColumns);