From: Jim Procter <j.procter@dundee.ac.uk>
Date: Mon, 18 Apr 2022 13:49:47 +0000 (+0100)
Subject: JAL-3997 check for tooltip being null before checking equivalence to last tooltip... 
X-Git-Tag: Release_2_11_2_6~68^2
X-Git-Url: http://source.jalview.org/gitweb/?a=commitdiff_plain;h=ea7aa18440e6140ec7485e6cefdfb1dffb945580;p=jalview.git

JAL-3997 check for tooltip being null before checking equivalence to last tooltip string
---

diff --git a/src/jalview/gui/SeqPanel.java b/src/jalview/gui/SeqPanel.java
index 54e3db7..111b4c0 100644
--- a/src/jalview/gui/SeqPanel.java
+++ b/src/jalview/gui/SeqPanel.java
@@ -1184,7 +1184,8 @@ public class SeqPanel extends JPanel
 
     String tooltip = AnnotationPanel.buildToolTip(anns[rowIndex], column,
             anns);
-    if (!tooltip.equals(lastTooltip))
+    if (tooltip == null ? tooltip != lastTooltip
+            : !tooltip.equals(lastTooltip))
     {
       lastTooltip = tooltip;
       lastFormattedTooltip = tooltip == null ? null