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;

}

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