W3School TIY Editor

class Student extends Person { private int graduationYear = 2018; public static void main(String[] args) { Student myObj = new Student(); System.out.println("姓名: " + myObj.fname + " " + myObj.lname); System.out.println("邮箱: " + myObj.email); System.out.println("年龄: " + myObj.age); System.out.println("毕业年份: " + myObj.graduationYear); } } class Person { protected String fname = "Bill"; protected String lname = "Gates"; protected String email = "bill@w3school.com.cn"; protected int age = 24; }