diff --git a/src/senior/Collection/CollectionList.kt b/src/senior/Collection/CollectionList.kt
index 9e52c62..3f8293e 100644
--- a/src/senior/Collection/CollectionList.kt
+++ b/src/senior/Collection/CollectionList.kt
@@ -4,6 +4,9 @@ class CollectionList {
 }
 
 fun main(args: Array<String>) {
+    /**
+     * 不可变list
+     */
     // 空集合
     var list: List<Int> = listOf()
     println(list)
@@ -15,4 +18,14 @@ fun main(args: Array<String>) {
     // 包含多个元素
     var multiList: List<Int> = listOf(1, 2, 4, 6, 7, 9)
     println(multiList)
+    println("multiList元素大小:${multiList.size}")
+
+    // 迭代器
+    var iterator = multiList.iterator()
+    while (iterator.hasNext()) {
+        print(iterator.next().toString() + "\t")
+    }
+    /**
+     *
+     */
 }