commit 35541f501ebae7d28bfb8fe3147be58ec0d3e2d0
Author: hewh <hwh2000@gmail.com>
Date:   Mon Mar 23 11:03:14 2026 +0800

    Old Program

diff --git a/w4/Person.java b/w4/Person.java
new file mode 100644
index 0000000..24b57e2
--- /dev/null
+++ b/w4/Person.java
@@ -0,0 +1,30 @@
+public class Person {
+    protected String name;
+    protected int age;
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    @Override
+    public String toString() {
+        return "Person{name='" + name + "', age=" + age + "}";
+    }
+}
\ No newline at end of file
diff --git a/w4/Student.java b/w4/Student.java
new file mode 100644
index 0000000..66c0d5d
--- /dev/null
+++ b/w4/Student.java
@@ -0,0 +1,40 @@
+public class Student {
+    private String name;
+    private int age;
+    private String studentId;
+
+    public Student(String name, int age, String studentId) {
+        this.name = name;
+        this.age = age;
+        this.studentId = studentId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public String getStudentId() {
+        return studentId;
+    }
+
+    public void setStudentId(String studentId) {
+        this.studentId = studentId;
+    }
+
+    @Override
+    public String toString() {
+        return "Student{name='" + name + "', age=" + age + ", studentId='" + studentId + "'}";
+    }
+}