每日代码系列（14）

class PersonA {
  private String name;
  public void setName(String newName) {
    name=newName;
  }
  public String getName(){
    return name;
  }
}
class StudentA extends PersonA {
  private String department;
  public void setDepartment(String newDepartment) {
    department=newDepartment;
  }
  public String getDepartment() {
    return department;
  }
}
class C2_2 {
  public static void main(String[] args) {
    StudentA s1=new StudentA();
    s1.setName("张三");
    s1.setDepartment("计算机系");
    System.out.println("姓名: "+s1.getName());
    System.out.println("系别: "+s1.getDepartment());
  }
}

继承。