diff --git a/boot-service/src/main/java/com/xwbing/demo/Ademo.java b/boot-service/src/main/java/com/xwbing/demo/Ademo.java
index 198308f..83ec461 100644
--- a/boot-service/src/main/java/com/xwbing/demo/Ademo.java
+++ b/boot-service/src/main/java/com/xwbing/demo/Ademo.java
@@ -4,7 +4,6 @@ import com.alibaba.fastjson.JSONArray;
 
 import java.util.HashMap;
 import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
 
 /**
  * 项目名称: boot-module-demo
@@ -20,7 +19,7 @@ public class Ademo {
         System.out.println(s);
         JSONArray jsonArray = JSONArray.parseArray("[1,2]");
         System.out.println("");
-        ConcurrentHashMap
+
     }
 
 }
diff --git a/boot-service/src/main/java/com/xwbing/demo/ForEachMap.java b/boot-service/src/main/java/com/xwbing/demo/ForEachMap.java
index 1ba10b7..a68c7aa 100644
--- a/boot-service/src/main/java/com/xwbing/demo/ForEachMap.java
+++ b/boot-service/src/main/java/com/xwbing/demo/ForEachMap.java
@@ -16,6 +16,7 @@ import java.util.Set;
  * --------------------------------------------------------------------------------------------------------------------------------
  * 说明: HashMap初始容量capacity为16,加载因子loadFactor为0.75,临界值threshold=capacity*loadFactor,如果元素个数超过临界值,capacity<<1
  * bucket地址:hash&(table.length-1)
+ * 数据结构:数组-链表-红黑树
  *
  * @author xiangwb
  */