From 2202c4d11394d4be413a9658c8a4f5c2d683e586 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 3 Feb 2026 10:16:12 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day04-Map=E9=9B=86=E5=90=88?=
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---
 .../src/com/inmind/map01/MapDemo03.java       | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 javaSE-day04/src/com/inmind/map01/MapDemo03.java

diff --git a/javaSE-day04/src/com/inmind/map01/MapDemo03.java b/javaSE-day04/src/com/inmind/map01/MapDemo03.java
new file mode 100644
index 0000000..d46588c
--- /dev/null
+++ b/javaSE-day04/src/com/inmind/map01/MapDemo03.java
@@ -0,0 +1,41 @@
+package com.inmind.map01;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+/*
+    键值对遍历
+    - public Set<Entry<K,V>> entrySet(): 获取到Map集合中所有的键值对对象的集合(Set集合)。
+ */
+public class MapDemo03 {
+    public static void main(String[] args) {
+        //创建一个双列集合，K为String，V也为String
+        Map<String, String> map = new HashMap<>();
+        //添加一对数据（增加）
+        map.put("刘备", "孙尚香");
+        map.put("吕布", "貂蝉");
+        map.put("董卓", "貂蝉");
+        System.out.println(map);
+
+        //直接获取双列集合所有的键值对对象
+        Set<Entry<String, String>> entries = map.entrySet();
+
+        //迭代器遍历键值对
+        Iterator<Entry<String, String>> iterator = entries.iterator();
+        while (iterator.hasNext()) {
+            Entry<String, String> entry = iterator.next();
+            System.out.println(entry.getKey()+"-"+entry.getValue());
+        }
+        System.out.println("-------------------------------------");
+        //foreach遍历键值对
+        for (Entry<String, String> entry : entries) {
+            System.out.println(entry.getKey()+"-"+entry.getValue());
+        }
+
+
+
+    }
+}