diff --git a/实验7/src/task4/HelloHashMap.java b/实验7/src/task4/HelloHashMap.java
index 28061b0..4ddd5c8 100644
--- a/实验7/src/task4/HelloHashMap.java
+++ b/实验7/src/task4/HelloHashMap.java
@@ -12,6 +12,10 @@ public class HelloHashMap {
             hashMapExample.put(scanner.next(), scanner.next());
         }
         // ---------------------Begin------------------------
+        hashMapExample.put("name", "lihong");
+        hashMapExample.remove("firstkey");
+        hashMapExample.replace("secondkey", "educode");
+        System.out.println(hashMapExample);
         // ---------------------End------------------------
     }
 }