diff --git a/src/main/java/org/apache/commons/ognl/OgnlOps.java b/src/main/java/org/apache/commons/ognl/OgnlOps.java
index 273a317..a527b91 100644
--- a/src/main/java/org/apache/commons/ognl/OgnlOps.java
+++ b/src/main/java/org/apache/commons/ognl/OgnlOps.java
@@ -255,7 +255,7 @@
         }
         String s = stringValue( value, true );
 
-        return ( s.length() == 0 ) ? 0.0 : Double.parseDouble( s );
+        return ( s.isEmpty() ) ? 0.0 : Double.parseDouble( s );
     }
 
     /**