diff --git a/Main.java b/Main.java
index 1a68b2dd0a36d3447eed91dc217b0ec3bb12c172..84343ce1682b4db6602e88e87c73af0b19c6852f 100644
--- a/Main.java
+++ b/Main.java
@@ -1,5 +1,7 @@
-class Main {
-  public static void main(String[] args) {
-    System.out.println("Hello world!");
-  }
+Map<String, Integer> map = new HashMap<>();
+// 添加键值对到map中
+
+for (String key : map.keySet()) {
+    Integer value = map.get(key);
+    // 处理key和value
 }
\ No newline at end of file