diff --git "a/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Main.java" "b/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Main.java"
new file mode 100644
index 0000000000000000000000000000000000000000..b833700acf08d676284a9e52bb81fbfb177ac7d7
--- /dev/null
+++ "b/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Main.java"
@@ -0,0 +1,58 @@
+package com.java.minxi.java_20240515.java_2302_刘贤国_2344310219;
+
+import java.util.HashSet;
+
+public class Main {
+    public static void main(String[] args) {
+        HashSet<String> hashset1 = new HashSet<>();
+        hashset1.add("a");
+        hashset1.add("b");
+        hashset1.add("c");
+        hashset1.add("d");
+        hashset1.add("e");
+
+        System.out.println("是否存在某个元素：" + hashset1.contains("a"));
+
+        hashset1.remove("code");
+        System.out.println("删除后：" + hashset1);
+
+        System.out.println("大小为：" + hashset1.size());
+
+        for (String ele : hashset1) {
+            System.out.println(ele);
+        }
+
+           String[] Array=hashset1.toArray(new String[hashset1.size()]);
+            for (String ell:Array) {
+                System.out.println(ell);
+            }
+
+        HashSet<String> result=new HashSet<>();
+
+        HashSet<String> hashset2 = new HashSet<>();
+        hashset2.add("aa");
+        hashset2.add("bb");
+
+        HashSet<String> hashset3=new HashSet<>();
+        hashset3.add("cc");
+        hashset3.add("bb");
+
+        result.clear();
+        result.addAll(hashset2);
+        result.retainAll(hashset3);
+        System.out.println("交集："+result);
+
+        result.clear();
+        result.addAll(hashset2);
+        result.removeAll(hashset3);
+        System.out.println("差集："+result);
+
+        result.clear();
+        result.addAll(hashset2);
+        result.addAll(hashset3);
+        System.out.println("并集："+result);
+
+    }
+}
+
+
diff --git "a/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Map.java" "b/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Map.java"
new file mode 100644
index 0000000000000000000000000000000000000000..9fef46b8adc11c5842ef4f73ba360bb70ad642fc
--- /dev/null
+++ "b/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Map.java"
@@ -0,0 +1,57 @@
+package com.java.minxi.java_20240515.java_2302_刘贤国_2344310219;
+
+import java.awt.*;
+import java.util.HashMap;
+
+public class Map {
+    public static void main(String[] args) {
+        HashMap<String,Integer> hashmap5=new HashMap<>();
+        hashmap5.put("aaa",1);
+        hashmap5.put("bbb",2);
+        hashmap5.put("ccc",3);
+        System.out.println(hashmap5);
+
+        System.out.println("使用键来获取对应的值，并打印出来:"+hashmap5.get("aaa"));
+
+        System.out.println("检查aaa键是否存在于 `HashMap` 中:"+ hashmap5.containsKey("aaa"));
+
+        System.out.println("遍历 `HashMap` 的键集合:");
+        for (String a: hashmap5.keySet()){
+            System.out.println(a);
+        }
+
+        System.out.println("遍历 `HashMap` 的值集合:");
+        for (Integer b: hashmap5.values()){
+            System.out.println(b);
+        }
+
+        System.out.println("使用 `entrySet()` 遍历 `HashMap` 的所有键值对:");
+        for (java.util.Map.Entry<String,Integer> en:hashmap5.entrySet()){
+            System.out.println(en);
+        }
+
+        hashmap5.put("aaa",200);
+        System.out.println("更新后："+hashmap5.get("aaa"));
+
+        hashmap5.remove("aaa");
+        for (java.util.Map.Entry<String,Integer> entry: hashmap5.entrySet()){
+            System.out.println("删除键aaa后：");
+            System.out.println(entry);
+        }
+
+        System.out.println("hashmap5的大小为："+hashmap5.size());
+
+        HashMap<Student,String> student1=new HashMap<>();
+        Student st1=new Student(1,"张三");
+        Student st2=new Student(2,"李四");
+        Student st3=new Student(3,"王五");
+
+        student1.put(st1,"闽大");
+        student1.put(st2,"北大");
+        student1.put(st3,"清华");
+
+
+
+
+    }
+}
diff --git "a/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Student.java" "b/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Student.java"
new file mode 100644
index 0000000000000000000000000000000000000000..61d1ac780a32664f96bb8841ffe6a0ce6d707b58
--- /dev/null
+++ "b/work/com/java/minxi/java_20240515/java_2302_\345\210\230\350\264\244\345\233\275_2344310219/Student.java"
@@ -0,0 +1,32 @@
+package com.java.minxi.java_20240515.java_2302_刘贤国_2344310219;
+
+public class Student {
+    private int id;
+    private String name;
+
+    public Student(){};
+
+    public Student(int id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
+
+
+