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Main.java
Second.java
// abstract class abstract class Main { public String fname = "John"; public String lname = "Doe"; public String email = "john@doe.com"; public int age = 24; public abstract void study(); // abstract method } // Subclass (inherit from Person) class Student extends Main { public int graduationYear = 2018; public void study() { System.out.println("Studying all day long"); } }
class Second { public static void main(String[] args) { // create an object of the Student class (which inherits attributes and methods from Main) Student myObj = new Student(); System.out.println("Name: " + myObj.fname + " " + myObj.lname); System.out.println("Email: " + myObj.email); System.out.println("Age: " + myObj.age); System.out.println("Graduation Year: " + myObj.graduationYear); myObj.study(); // call abstract method } }
姓名：John Doe
電子郵件：john@doe.com
Age: 24
畢業年份：2018
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