笔记备份:2025-08-21 20:37:10

This commit is contained in:
2025-08-21 20:37:10 +08:00
parent e14c86dde3
commit 3f3757fd54
3 changed files with 26 additions and 10 deletions

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@@ -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