added handler for java.util.* elements

Author: teogor

flow-kit/src/main/java/com/zeoflow/utils/string/StringCreator.java

@@ -414,6 +414,10 @@ private void addArgument(String format, char c, Object arg, boolean camelCase, b
         private String argToName(Object o)
         {
             if (o instanceof CharSequence) return o.toString();
+            else if (o instanceof Integer) return o.toString();
+            else if (o instanceof Long) return o.toString();
+            else if (o instanceof Boolean) return o.toString();
+            else if (o instanceof Float) return o.toString();
             throw new IllegalArgumentException("expected name but was " + o);
         }