import java.util.*;
class Person {
// declare name & birthdate of the person here
public Person(String name, String birthdate) {
????????????..
????????????..
}
public String getName() {
???????????.
}
public String toString() {
String result = "Name: " + name;
result += "\tBirthdate: " + birthdate;
return result;
} }
class Student extends Person {
private String stunum;
public Student(String name, String date, String num) {
????????????
????????????.
}
public String toString() {
String result = super.toString();
result += "\tStudent number: " + stunum;
return result;
}
public String getStudentNumber() {
?????????
} }
class Undergrad extends Student{
private String program;
public Undergrad(String name, String date, String num, String program) {
????????????
????????????
}
public String toString() {
String result = "Undergrad:\n" + super.toString();
result += "\tProgram: " + program;
return result;
} }
class Grad extends Student {
private String area;
public Grad(String name, String date, String num, String area) {
????????????.
?????????????
}
public String toString() {
String result = "Grad:\n" + super.toString();
result += "\tResearch area: " + area;
return result;
} }
|  0 |
