diff --git a/实验5/.vscode/settings.json b/实验5/.vscode/settings.json
new file mode 100755
index 0000000..0ac215c
--- /dev/null
+++ b/实验5/.vscode/settings.json
@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}
diff --git a/实验5/README.md b/实验5/README.md
new file mode 100755
index 0000000..a43b9f6
--- /dev/null
+++ b/实验5/README.md
@@ -0,0 +1,18 @@
+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).
diff --git a/实验5/src/task1/Main.java b/实验5/src/task1/Main.java
new file mode 100755
index 0000000..240a424
--- /dev/null
+++ b/实验5/src/task1/Main.java
@@ -0,0 +1,25 @@
+//Main.java
+package task1;
+
+import java.util.Date;
+import java.util.Scanner;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Locale;
+
+public class Main {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        SimpleDateFormat in = new SimpleDateFormat("yyyy M dd");
+        Date d = new Date();
+        try {
+            d = in.parse(input.nextLine());
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        SimpleDateFormat out = new SimpleDateFormat("yyyy MMMM dd EEEE", Locale.ENGLISH);
+        String formattedDate = out.format(d);
+        System.out.println("今天是" + out.format(d).toUpperCase());
+
+    }
+}
\ No newline at end of file
diff --git a/实验5/src/task2/Main.java b/实验5/src/task2/Main.java
new file mode 100755
index 0000000..743bc70
--- /dev/null
+++ b/实验5/src/task2/Main.java
@@ -0,0 +1,27 @@
+//Main.java
+package task2;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        Date inDate = new Date();
+        SimpleDateFormat inFormat = new SimpleDateFormat("yyyy年M月d日", Locale.CHINA);
+        System.out.print("请输入您家孩子的出生日期（格式为yyyy年M月d日）：");
+        try {
+            inDate = inFormat.parse(input.nextLine());
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        long inTimeStamp = inDate.getTime();
+        long outTimeStamp = inTimeStamp + (long) 100 * 24 * 60 * 60 * 1000;
+        Date outDate = new Date(outTimeStamp);
+        SimpleDateFormat outFormat = new SimpleDateFormat("yyyy年M月dd日 EEEE", Locale.CHINA);
+        System.out.println("经计算，您家孩子的百日宴应该设在" + outFormat.format(outDate));
+    }
+}
diff --git a/实验5/src/task3/StringLearning.java b/实验5/src/task3/StringLearning.java
new file mode 100755
index 0000000..565ff61
--- /dev/null
+++ b/实验5/src/task3/StringLearning.java
@@ -0,0 +1,22 @@
+package task3;
+
+import java.util.Scanner;
+
+public class StringLearning {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        String stringExample = scanner.next();
+        String endStr = " end";
+        // ---------------------Begin------------------------
+        System.out.println(stringExample);// 1.输出原字符串
+        System.out.println(stringExample.length());// 2.求出字符串长度
+        // 3.字符串转换成相应的大/小写
+        System.out.println(stringExample.toUpperCase());
+        System.out.println(stringExample.toLowerCase());
+        // 4.截取指定位置的字符串（3-7）
+        System.out.println(stringExample.substring(3, 7));
+        // 5.字符串相加具体输出要求请看测试说明。
+        System.out.println(stringExample + endStr);
+        // ---------------------End------------------------
+    }
+}
diff --git a/实验5/src/task4/Main.java b/实验5/src/task4/Main.java
new file mode 100755
index 0000000..b620d19
--- /dev/null
+++ b/实验5/src/task4/Main.java
@@ -0,0 +1,15 @@
+//Main.java
+package task4;
+
+import java.lang.Math;
+
+public class Main {
+    public static void main(String[] args) {
+        double value1 = 2, value2 = 0;
+        System.out.println("绝对值：\t" + Math.abs(value1));
+        System.out.println("3次幂：\t" + Math.pow(value1, 3));
+        System.out.println("二次方根：\t" + Math.pow(value1, 0.5));
+        System.out.println("sin值：\t" + Math.sin(value1));
+        System.out.println("较大者：\t" + Math.max(value1, value2));
+    }
+}
diff --git a/实验5/src/task5/Roster.java b/实验5/src/task5/Roster.java
new file mode 100755
index 0000000..3035249
--- /dev/null
+++ b/实验5/src/task5/Roster.java
@@ -0,0 +1,18 @@
+package task5;
+
+import java.util.Scanner;
+
+public class Roster {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        /********** Begin *********/
+        String roster1 = "张三,李四,王五";
+        String roster2 = scanner.nextLine();
+        if (roster1.equals(roster2)) {
+            System.out.println("相同");
+        } else {
+            System.out.println("不同");
+        }
+        /********** End *********/
+    }
+}