diff --git a/w2 b/w2
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+// 定义Student类
+class Student {
+    // 定义属性
+    int studentId;
+    String name;
+    double score;
+
+    // 定义study方法
+    void study() {
+        System.out.println("学生" + name + "（学号：" + studentId + "）正在学习，当前成绩为：" + score);
+    }
+}
+
+// 主类
+public class StudentTest {
+    public static void main(String[] args) {
+        // 实例化第一个Student对象
+        Student student1 = new Student();
+        student1.studentId = 101;
+        student1.name = "张三";
+        student1.score = 92.5;
+        student1.study(); // 调用study方法
+
+        // 实例化第二个Student对象
+        Student student2 = new Student();
+        student2.studentId = 102;
+        student2.name = "李四";
+        student2.score = 88.0;
+        student2.study(); // 调用study方法
+    }
+}
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