diff -r b632733724a8 -r 40cabcdcd2be samples/contravariance/src-api2.0/api/Contravariance.java
--- a/samples/contravariance/src-api2.0/api/Contravariance.java	Tue Oct 18 06:55:12 2011 +0200
+++ b/samples/contravariance/src-api2.0/api/Contravariance.java	Thu Oct 30 21:30:10 2014 +0100
@@ -5,8 +5,8 @@
     }
 
     // BEGIN: variance.contravariance.v2
-    public static boolean isPositive(Number n1) {
-        return n1.doubleValue() > 0.0d;
+    public static boolean isPositive(Number aNumber) {
+        return aNumber.doubleValue() > 0.0d;
     }
     // END: variance.contravariance.v2
 }