diff --git "a/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/DateExample.java" "b/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/DateExample.java"
new file mode 100644
index 0000000000000000000000000000000000000000..530f1c78346d00a97f6e9e689999d7a68b91e90e
--- /dev/null
+++ "b/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/DateExample.java"
@@ -0,0 +1,51 @@
+package com.java.minxi.java_20240516.java_2302_高耀_2344310244;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class DateExample {
+    public static void main(String[] args) {
+
+        Date currentDate = new Date();
+        System.out.println("当前时间：" + currentDate);
+
+        printDateInfo(currentDate);
+
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        String formattedDate = sdf.format(currentDate);
+        System.out.println("格式化后的日期：" + formattedDate);
+
+        String dateStr = "2023-06-18 12:30:00";
+        Date parsedDate = parseDate(dateStr);
+        System.out.println("解析后的日期：" + parsedDate);
+
+        long currentTimeMillis = System.currentTimeMillis();
+        System.out.println("当前时间戳：" + currentTimeMillis);
+
+        Date systemDate = new Date(currentTimeMillis);
+        System.out.println("当前时间：" + sdf.format(systemDate));
+    }
+
+    public static void printDateInfo(Date date) {
+        SimpleDateFormat sdf0 = new SimpleDateFormat("yyyy-MM-dd");
+        String[] dateInfo = sdf0.format(date).split("-");
+
+        int year = Integer.parseInt(dateInfo[0]);
+        int month = Integer.parseInt(dateInfo[1]);
+        int day = Integer.parseInt(dateInfo[2]);
+
+        System.out.println("年份：" + year);
+        System.out.println("月份：" + month);
+        System.out.println("天数：" + day);
+    }
+
+    public static Date parseDate(String dateStr) {
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        try {
+            return sdf.parse(dateStr);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+}
diff --git "a/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/MathExample.java" "b/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/MathExample.java"
new file mode 100644
index 0000000000000000000000000000000000000000..942a56c41f307e5ae774fd2eddf5a7cad086701f
--- /dev/null
+++ "b/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/MathExample.java"
@@ -0,0 +1,47 @@
+package com.java.minxi.java_20240516.java_2302_高耀_2344310244;
+
+import java.util.Scanner;
+
+public class MathExample {
+    public static void main(String[] args) {
+        Scanner scanner=new Scanner(System.in);
+        System.out.println("请输入一个数字：");
+        double num = scanner.nextDouble();
+        double sNum = Math.abs(num);
+        System.out.println("绝对值为：" + sNum);
+
+        int num1 = 4;
+        int num2 = 18;
+        int num3 = 1;
+
+        int min = Math.min(num1, Math.min(num2, num3));
+        int max = Math.max(num1, Math.max(num2, num3));
+
+        System.out.println("最小值为：" + min);
+        System.out.println("最大值为：" + max);
+
+        System.out.println("请输入一个浮点数：");
+        double ha = scanner.nextDouble();
+        long roundedNum = Math.round(ha);
+        System.out.println("四舍五入的整数为：" + roundedNum);
+
+        System.out.println("请输入一个最大值：");
+        int maxValue = scanner.nextInt();
+        double randomNum = Math.random();
+        System.out.println("生成的随机数为：" + randomNum);
+        System.out.println("相乘后为" + randomNum * maxValue);
+
+        //计算平均值
+        int[] array = {3, 19, 11, 21, 50};
+        double sum = 0;
+
+        for (int num5 : array) {
+            sum += num5;
+        }
+
+        double average = sum / array.length;
+        System.out.println("平均值为：" + average);
+
+
+    }
+}
diff --git "a/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/Person.java" "b/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/Person.java"
new file mode 100644
index 0000000000000000000000000000000000000000..e24266207bf2b9bc346f6c20ccaa1046e5ee13dd
--- /dev/null
+++ "b/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/Person.java"
@@ -0,0 +1,19 @@
+package com.java.minxi.java_20240516.java_2302_高耀_2344310244;
+
+public class Person {
+    private String name;
+    private int age;
+    @Override
+    public String toString() {
+        return "Name: " + name + ", Age: " + age;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        Person person = (Person) obj;
+        return false;
+    }
+}
+
diff --git "a/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/StringExample.java" "b/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/StringExample.java"
new file mode 100644
index 0000000000000000000000000000000000000000..23cbcfa5edb39f86fa43ce7f18ae7033bb29c1d3
--- /dev/null
+++ "b/work/com/java/minxi/java_20240516/java_2302_\351\253\230\350\200\200_2344310244/StringExample.java"
@@ -0,0 +1,120 @@
+package com.java.minxi.java_20240516.java_2302_高耀_2344310244;
+
+public class StringExample {
+    public static void main(String[] args) {
+        // 1. 字符串连接
+        String str1 = "Hello, ";
+        String str2 = "World!";
+        String result1 = str1 + str2;
+        System.out.println("字符串连接结果：" + result1);
+
+        // 2. 字符串长度
+        String testStr = "Hello, World!";
+        int length = getStringLength(testStr);
+        System.out.println("字符串长度：" + length);
+
+        // 3. 字符串分割
+        String csvString = "apple,banana,orange";
+        String[] words = csvString.split(",");
+        System.out.println("字符串分割：");
+        for (String word : words) {
+            System.out.println(word);
+        }
+
+        // 4. 字符串反转
+        String trueStr = "Hello, World!";
+        String falshStr = reverseString(trueStr);
+        System.out.println("字符串反转：" + falshStr);
+
+        // 5. 字符串大小写转换
+        String mixedStr = "HeLLo, WoRLd!";
+        String lowerStr = mixedStr.toLowerCase();
+        String upperStr = mixedStr.toUpperCase();
+        System.out.println("小写字符串：" + lowerStr);
+        System.out.println("大写字符串：" + upperStr);
+
+        // 6. 字符串搜索
+        String searchStr = "Hello, World!";
+        boolean containsStr = searchStr.contains("World");
+        System.out.println("是否包含 'World'：" + containsStr);
+
+        // 7. 字符串替换
+        String originalString = "Hello, World!";
+        String replacedString = originalString.replace("World", "Java");
+        System.out.println("替换后的字符串：" + replacedString);
+
+        // 8. 字符串修剪
+        String oristr = "   Hello, World!   ";
+        String trimmedString = oristr.trim();
+        System.out.println("修剪后的字符串：" + trimmedString);
+
+        // 9. 字符串比较
+        String strA = "hello";
+        String strB = "Hello";
+        boolean equalsIgnoreCase = strA.equalsIgnoreCase(strB);
+        System.out.println("忽略大小写是否相等：" + equalsIgnoreCase);
+
+        // 其余实现方法请在下面继续...
+
+        // 10. 子串操作
+        String sourceStr = "Hello, World!";
+        String subString = getSubstring(sourceStr, 7, 12);
+        System.out.println("子串：" + subString);
+
+        // 11. 字符串结束符检查
+        String checkStr1 = "Hello, World!";
+        boolean endsWith1 = checkStr1.endsWith("!");
+        System.out.println("是否以 '!' 结尾：" + endsWith1);
+
+        // 12. 字符串开始符检查
+        String checkStr2 = "Hello, World!";
+        boolean startsWith = checkStr2.startsWith("Hello");
+        System.out.println("是否以 'Hello' 开始：" + startsWith);
+
+        // 13. 字符串中字符的出现次数
+        String countStr = "Hello, World!";
+        char charToCount = 'l';
+        int charCount = countCharOccurrences(countStr, charToCount);
+        System.out.println("字符 'l' 出现次数：" + charCount);
+
+        // 14. 字符串与数字的转换
+        String numStr = "123";
+        int numInt = Integer.parseInt(numStr);
+        System.out.println("转换为整数：" + numInt);
+
+        // 15. StringBuilder拼接
+        String strConst1 = "Hello, ";
+        String strConst2 = "World!";
+        String strConst3 = "Nice to meet you!";
+        StringBuilder sb = new StringBuilder();
+        sb.append(strConst1).append(strConst2).append(strConst3);
+        System.out.println("StringBuilder拼接结果：" + sb.toString());
+    }
+
+    // 获取字符串长度
+    public static int getStringLength(String str) {
+        return str.length();
+    }
+
+    // 字符串反转
+    public static String reverseString(String str) {
+        return new StringBuilder(str).reverse().toString();
+    }
+
+    // 提取子串
+    public static String getSubstring(String str, int startIndex, int endIndex) {
+        return str.substring(startIndex, endIndex);
+    }
+
+    // 统计字符出现次数
+    public static int countCharOccurrences(String str, char ch) {
+        int count = 0;
+        for (int i = 0; i < str.length(); i++) {
+            if (str.charAt(i) == ch) {
+                count++;
+            }
+        }
+        return count;
+    }
+}
+