From 1595d2a08e7398f6a7796f116b05bf655407b3bc Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Mon, 3 Aug 2026 11:47:15 +0800
Subject: [PATCH] =?UTF-8?q?s-day04-TreeMap=E4=BF=9D=E5=AD=98=E8=87=AA?=
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---
 .../com/inmind/treemap03/TreeMapDemo10.java   | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 s-day04/src/com/inmind/treemap03/TreeMapDemo10.java

diff --git a/s-day04/src/com/inmind/treemap03/TreeMapDemo10.java b/s-day04/src/com/inmind/treemap03/TreeMapDemo10.java
new file mode 100644
index 0000000..3fbbc0a
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+++ b/s-day04/src/com/inmind/treemap03/TreeMapDemo10.java
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+package com.inmind.treemap03;
+
+import com.inmind.treeset02.Student;
+
+import java.util.TreeMap;
+
+/*
+TreeMap的基本使用
+带有自然排序功能的双列集合(以Key值的自然排序功能进行排序)
+
+总结：treeSet和treeMap都是具有排序功能的集合，所以要存入有排序功能的自定义对象才能使用排序功能，如果
+没有排序功能，会报错：java.lang.ClassCastException: com.inmind.treeset02.Student cannot be cast to java.lang.Comparable
+
+Collection:单列集合父接口
+    List:
+        ArrayList:底层是object[],查询快，增删慢
+        LinkedList：底层是双向链接，查询慢，增删快
+    Set:
+        HashSet:底层哈希表，在实现去重的基础上，能够高效查询，HashCode,equals重写
+        LinkedHashSet:底层哈希表+链表，实现Set集合的有序
+        TreeSet：拥有自然排序功能且会直接排序，元素必要有排序（Comparable，Comparator）
+Map：
+    HashMap：存取无序的，不可重复的双列集合
+    LinkedhashMap：存取有序，不可重复的双列集合
+    TreeMap：拥有自然排序功能且会直接排序，元素必要有排序（Comparable，Comparator）
+
+ */
+public class TreeMapDemo10 {
+    public static void main(String[] args) {
+        //创建一个学生类为key，住址为String的有排序功能的双列集合
+        TreeMap<Student,String> treeMap = new TreeMap<>();
+        treeMap.put(new Student("小王1", 18), "南京");
+        treeMap.put(new Student("小王2", 17), "南京");
+        treeMap.put(new Student("小王3", 20), "南京");
+
+        System.out.println(treeMap);
+    }
+}