以下程序定义了父类Person和子类Student。
程序将输出：Liubei 25 Shanghai A。
class Person{
private String name;
private int 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;}
Person(String name, int age){ this.name=name; this.age=age; }
public String toString(){
String s=name+"\t"+age;
return s;
}
}
Class Student extends Person{
private String hometown;
private char grade;
Student(String name，int age, String hometown, char grade){
____①______;
this.hometown=hometown;
this.grade=grade;
}
void print(){
String s= ____②__ +" "+ hometown+" "+grade;
System.out.println(s);
}
}
public class Test27{
public static void main(String[] args){
Student st=new Student("Liubei", 25, "Shanghai",'A');
st.____③__ ；
}
}
