Minor performance improvement. Use String.lastIndexOf(int) instead of String.lastIndexOf(String).
diff --git a/src/org/apache/xalan/extensions/XPathFunctionResolverImpl.java b/src/org/apache/xalan/extensions/XPathFunctionResolverImpl.java
index 4fc1c24..d20d80c 100644
--- a/src/org/apache/xalan/extensions/XPathFunctionResolverImpl.java
+++ b/src/org/apache/xalan/extensions/XPathFunctionResolverImpl.java
@@ -58,7 +58,7 @@
         }
         else if (!uri.equals(ExtensionNamespaceContext.JAVA_EXT_URI))
         {
-            int lastSlash = className.lastIndexOf("/");
+            int lastSlash = className.lastIndexOf('/');
             if (-1 != lastSlash)
                 className = className.substring(lastSlash + 1);
         }