Finalize calculate method

diff --git a/src/jalview/analysis/AAFrequency.java b/src/jalview/analysis/AAFrequency.java
index 1f6f423..461b545 100755 (executable)
--- a/src/jalview/analysis/AAFrequency.java
+++ b/src/jalview/analysis/AAFrequency.java
@@ -43,7 +43,7 @@ public class AAFrequency
     * the values being the count of each residue in that column.\r
     * This class is used extensively in calculating alignment colourschemes\r
     * that depend on the amount of conservation in each alignment column. */\r
-    public static Vector calculate(Vector sequences, int start, int end)\r
+    public static final Vector calculate(Vector sequences, int start, int end)\r
     {\r
       Vector result = new Vector();\r
       Hashtable residueHash;\r