上传文件至 'W5'

W5/Main.java

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+public class Main {
+    public static void main(String[] args) {
+        // 1. 创建一个 Person 数组，长度为 2
+        Person[] people = new Person[2];
+
+        // 2. 存放 Student 和 Teacher 对象 (向上转型)
+        people[0] = new Student();
+        people[1] = new Teacher();
+
+        // 3. 循环调用 answer() 方法，观察多态输出
+        System.out.println("--- 开始回答问题 ---");
+        for (int i = 0; i < people.length; i++) {
+            people[i].answer();
+        }
+    }
+}

W5/Person.java

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+public abstract class Person {
+    public abstract void answer();
+}

W5/Student.java

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+public class Student extends Person {
+    @Override
+    public void answer() {
+        System.out.println("学生回答：这道题我会，选 C！");
+    }
+}

W5/Teacher.java

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+public class Teacher extends Person {
+    @Override
+    public void answer() {
+        System.out.println("老师回答：没错，这位同学回答正确。");
+    }
+}