From d0952b1aea5ca7b8bf51f51bb3777e629e30ba3b Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 3 Feb 2026 11:58:31 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day04-=E5=85=B7=E6=9C=89?=
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 =?UTF-8?q?=E6=9C=AC=E4=BD=BF=E7=94=A8?=
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---
 .../src/com/inmind/map01/TreeDemo07.java      | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 javaSE-day04/src/com/inmind/map01/TreeDemo07.java

diff --git a/javaSE-day04/src/com/inmind/map01/TreeDemo07.java b/javaSE-day04/src/com/inmind/map01/TreeDemo07.java
new file mode 100644
index 0000000..b042c1d
--- /dev/null
+++ b/javaSE-day04/src/com/inmind/map01/TreeDemo07.java
@@ -0,0 +1,39 @@
+package com.inmind.map01;
+
+import java.util.Comparator;
+import java.util.TreeSet;
+
+/*
+TreeSet和TreeMap对比学习
+
+TreeSet 是 Java 集合框架中一个基于 TreeMap 实现的有序集合,具有以下特点：
+元素有序（默认自然排序，也可通过构造方法指定比较器）
+ */
+public class TreeDemo07 {
+    public static void main(String[] args) {
+        // 1. 创建 TreeSet（默认自然排序）
+        TreeSet<Integer> treeSet = new TreeSet<>();
+        treeSet.add(3);
+        treeSet.add(2);
+        treeSet.add(11);
+        treeSet.add(1);
+
+        System.out.println(treeSet);
+
+        // 2. 创建 TreeSet（指定比较器，如降序排序）
+        TreeSet<Integer> treeSet1 = new TreeSet<>(new Comparator<Integer>() {
+            @Override
+            public int compare(Integer o1, Integer o2) {
+                return o2 - o1;
+            }
+        });
+
+        treeSet1.add(3);
+        treeSet1.add(2);
+        treeSet1.add(11);
+        treeSet1.add(1);
+
+        System.out.println(treeSet1);
+
+    }
+}