diff --git a/Readme.md b/Readme.md
index 8341685..7dac112 100644
--- a/Readme.md
+++ b/Readme.md
@@ -42,3 +42,24 @@
                 ? Objects::isNull
                 : object -> targetRef.equals(object);    
     }
+
+## Comparator<T>:
+
+    Recibe dos argumentos y retorna un int.
+    
+    - Método funcional:
+    
+        int compare(T t1, T t2);
+      
+    - Métodos:
+    
+        static <T, U extends Comparable<? super U>> Comparator<T> comparing(Function<T, U> keyExtractor) {
+            Objects.requireNonNull(keyExtractor);
+            return (p1, p2) -> {
+                U u1 = keyExtractor.apply(p1);
+                U u2 = keyExtractor.apply(p2);
+                return u1.compareTo(u2);
+            };
+        }
+    
+