diff --git a/.obsidian/plugins/keep-the-rhythm/data.json b/.obsidian/plugins/keep-the-rhythm/data.json
index fbee794..e3e6d63 100644
--- a/.obsidian/plugins/keep-the-rhythm/data.json
+++ b/.obsidian/plugins/keep-the-rhythm/data.json
@@ -538,11 +538,11 @@
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diff --git a/.obsidian/plugins/novel-word-count/data.json b/.obsidian/plugins/novel-word-count/data.json
index e0bde75..3dc563b 100644
--- a/.obsidian/plugins/novel-word-count/data.json
+++ b/.obsidian/plugins/novel-word-count/data.json
@@ -463,20 +463,20 @@
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       "targetNodeType": "file",
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diff --git a/A1-Work/语言/Java/基础学习.md b/A1-Work/语言/Java/基础学习.md
index 542ba2b..0b35aa1 100644
--- a/A1-Work/语言/Java/基础学习.md
+++ b/A1-Work/语言/Java/基础学习.md
@@ -489,6 +489,22 @@ public class Test {
 
 ## 集合
 
+### 具体集合
+| 集合类型        | 描述                                                 |
+|:--------------- |:---------------------------------------------------- |
+| ArrayList       | 一种可以动态增长和缩减的索引序列                     |
+| LinkedList      | 一种可以在任何位置进行高效地插入和删除操作的有序序列 |
+| ArrayDeque      | 一种用循环数组实现的双端队列                         |
+| HashSet         | 一种没有重复元素的无序集合                           |
+| TreeSet         | 一种有序集合                                         |
+| EnumSet         | 一种包含枚举类型值的集                               |
+| LinkedHashSet   | 一种可以记住元素插入次序的集                         |
+| PriorityQueue   | 一种允许高效删除最小元素的集合                       |
+| HashMap         | 一种存储键/值关联的数据结构                          |
+| TreeMap         | 一种键值属于枚举类型的映射表                         |
+| LinkedHashMap   | 一种可以记住键/值项添加次序的映射表                  |
+| WeakHashMap     | 一种其值毫无用武之地后可以被垃圾回收器回收的映射表   |
+| IdentityHashMap | 一种用 == 而不是用 equals 比较键值的                 | 
 
 ## JDK 特性