diff --git a/W2/Main.java b/W2/Main.java
index 28d2ed2..35e11b3 100644
--- a/W2/Main.java
+++ b/W2/Main.java
@@ -1,27 +1,11 @@
 public class Main {
     public static void main(String[] args) {
-        int[] voltages = {10, -5, 7, 105, 999, 89, 76, 74};
-        int validCount = 0; // 有效数据个数
-        double validSum = 0; // 有效数据总和
+        // 实例化两个 Student 对象
+        Student stu1 = new Student(2026001, "张三", 90.5);
+        Student stu2 = new Student(2026002, "李四", 88.0);
 
-        for (int voltage : voltages) {
-            if (voltage == 999) {
-                System.out.println("程序终止，传感器离线");
-                break; // 遇到999，终止程序
-            } else if (voltage < 0) {
-                System.out.println("警告：发现负数，数据已跳过");
-            } else if (voltage >= 1 && voltage <= 100) {
-                validCount++;
-                validSum += voltage;
-            }
-            // 其他情况（如>100）不处理
-        }
-
-        if (validCount > 0) {
-            double average = validSum / validCount;
-            System.out.printf("有效数据个数：%d，平均值：%.2f\n", validCount, average);
-        } else {
-            System.out.println("没有收集到有效数据，打印初始状态");
-        }
+        // 调用 study() 方法
+        stu1.study();
+        stu2.study();
     }
-}
+}
\ No newline at end of file
diff --git a/W2/Student.java b/W2/Student.java
new file mode 100644
index 0000000..9f22106
--- /dev/null
+++ b/W2/Student.java
@@ -0,0 +1,32 @@
+// Student.java
+public class Student {
+    // 成员属性
+    private int studentId;
+    private String name;
+    private double score;
+
+    // 构造方法（用于创建对象时给属性赋值）
+    public Student(int studentId, String name, double score) {
+        this.studentId = studentId;
+        this.name = name;
+        this.score = score;
+    }
+
+    // study() 方法
+    public void study() {
+        System.out.println(name + "（学号：" + studentId + "）正在学习，当前成绩：" + score);
+    }
+
+    // 可选：getter/setter 方法（用于访问/修改私有属性）
+    public int getStudentId() {
+        return studentId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public double getScore() {
+        return score;
+    }
+}
\ No newline at end of file
diff --git a/W2/W2.txt b/W2/W2.txt
new file mode 100644
index 0000000..e69de29