diff --git "a/work/com/java/minxi/java_20240515/java_\345\247\232\347\277\224\347\277\224_2344310201/HashSet.java" "b/work/com/java/minxi/java_20240515/java_\345\247\232\347\277\224\347\277\224_2344310201/HashSet.java"
new file mode 100644
index 0000000000000000000000000000000000000000..a1b058918401a94ce55d5cb1e00c8264994c3326
--- /dev/null
+++ "b/work/com/java/minxi/java_20240515/java_\345\247\232\347\277\224\347\277\224_2344310201/HashSet.java"
@@ -0,0 +1,56 @@
+package com.java.minxi.java_20240515.java_姚翔翔_2344310201;
+
+
+import java.util.ArrayList;
+
+public class HashSet {
+    public static void main(String[] args) {
+        java.util.HashSet<Object> yy = new java.util.HashSet<>();
+        yy.add("1");
+        yy.add("2");
+        yy.add("3");
+        yy.add("4");
+        yy.add("5");
+        System.out.println(yy);
+
+        System.out.println("是否存在"+yy.contains("1"));
+
+        yy.remove("3");
+        System.out.println("是否移除"+yy);
+
+        System.out.println(yy.size());
+
+        for (Object set : yy){
+            System.out.println(yy);
+        }
+
+        String[] kfc =new String[yy.size()];
+        yy.toArray(kfc);
+        for (Object set:kfc){
+            System.out.println(yy);
+        }
+
+        java.util.HashSet<Object> objects = new java.util.HashSet<>();
+
+        java.util.HashSet<Object> objects1 = new java.util.HashSet<>();
+
+        objects1.add("6");
+        objects1.add("6");
+        objects1.add("6");
+        objects1.add("6");
+
+        objects.addAll(yy);
+        objects.addAll(objects1);
+        System.out.println("集合的并集为"+objects);
+
+        objects.clear();
+        objects.addAll(yy);
+        objects.retainAll(objects1);
+        System.out.println("集合的交集为"+objects);
+
+        objects.clear();
+        objects.addAll(yy);
+        objects.removeAll(objects1);
+        System.out.println("交集的差集为"+objects);
+    }
+}
diff --git "a/work/com/java/minxi/java_20240515/java_\345\247\232\347\277\224\347\277\224_2344310201/Map.java" "b/work/com/java/minxi/java_20240515/java_\345\247\232\347\277\224\347\277\224_2344310201/Map.java"
new file mode 100644
index 0000000000000000000000000000000000000000..904cc55ea849750d47b5c6ef82fea65d9d5d2abb
--- /dev/null
+++ "b/work/com/java/minxi/java_20240515/java_\345\247\232\347\277\224\347\277\224_2344310201/Map.java"
@@ -0,0 +1,39 @@
+package com.java.minxi.java_20240515.java_姚翔翔_2344310201;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+
+public class Map {
+    public static void main(String[] args) {
+        HashMap<Object, Object> xx = new HashMap<>();
+        xx.put("哦",1);
+        xx.put("嗯",2);
+        xx.put("啊",3);
+
+        Set set =xx.keySet();
+        System.out.println(set);
+
+        System.out.println(xx.containsKey("哦"));
+        System.out.println(xx.containsKey("嗯"));
+        System.out.println(xx.containsKey("啊"));
+
+        for (Object key:xx.keySet()){
+            System.out.println(key);
+        }
+
+        for (Object value:xx.values()){
+            System.out.println(value);
+        }
+
+        for (java.util.Map.Entry<Object,Object> entry : xx.entrySet()){
+            System.out.println(entry.getKey()+""+entry.getValue());
+        }
+
+        xx.put("哼",4);
+
+        xx.remove("嗯",2);
+
+        System.out.println(xx.size());
+    }
+}
diff --git "a/work/com/java/minxi/java_20240516/java_\345\247\232\347\277\224\347\277\224_2344310201/Math.java" "b/work/com/java/minxi/java_20240516/java_\345\247\232\347\277\224\347\277\224_2344310201/Math.java"
new file mode 100644
index 0000000000000000000000000000000000000000..6e0462365ac2e3fc14e495048d257e0429de868d
--- /dev/null
+++ "b/work/com/java/minxi/java_20240516/java_\345\247\232\347\277\224\347\277\224_2344310201/Math.java"
@@ -0,0 +1,28 @@
+package com.java.minxi.java_20240516.java_姚翔翔_2344310201;
+
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Scanner;
+
+public class Math {
+    public static void main(String[] args) {
+        Scanner scanner =new Scanner(System.in);
+        System.out.println("请输入一个数字：");
+        int num = scanner.nextInt();
+        System.out.println("绝对值为："+java.lang.Math.abs(num));
+
+        System.out.println("请输入一个浮点数：");
+        Float num2 =scanner.nextFloat();
+        System.out.println("四舍五入后： "+ java.lang.Math.round(num2));
+
+        double num3 = java.lang.Math.random();
+        System.out.println("请输入一个数字乘以'Math.random':");
+        double num4 = scanner.nextDouble();
+        System.out.println(java.lang.Math.random() +" * "+num4+" = "+ java.lang.Math.random() *num4);
+
+        ZonedDateTime now =ZonedDateTime.now();
+        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy年MM月dd日 HH:mm:ss EE a");
+        System.out.println("现在时间： "+dateTimeFormatter.format(now));
+
+    }
+}
diff --git "a/work/com/java/minxi/java_20240516/java_\345\247\232\347\277\224\347\277\224_2344310201/Person.java" "b/work/com/java/minxi/java_20240516/java_\345\247\232\347\277\224\347\277\224_2344310201/Person.java"
new file mode 100644
index 0000000000000000000000000000000000000000..2f2df48170028eb8d820c80756b78a36539918b2
--- /dev/null
+++ "b/work/com/java/minxi/java_20240516/java_\345\247\232\347\277\224\347\277\224_2344310201/Person.java"
@@ -0,0 +1,20 @@
+package com.java.minxi.java_20240516.java_姚翔翔_2344310201;
+
+public class Person {
+    String name;
+    int age;
+
+    @Override
+    public String toString() {
+        return name+age;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this.name ==name && this.age==age){
+            return true;
+        }else {
+            return false;
+        }
+    }
+}