Description
定义Student学生类，拥有学号、姓名、性别属性，提供构造函数，以及相应属性的get set函数，提供函数attendClass(String className)表示上课。 定义CollegeStudent大学生类继承自Student类，拥有新增属性专业，提供构造函数，提供新增属性的get和set函数 定义GraduateStudent研究生类继承自CollegeStudent类，拥有新增属性导师，提供构造函数，提供新增属性的get和set函数，提供函数doResearch() 表示做研究（打印xx is doing research）。 main函数中对构造的类进行测试
Input
学生类信息，学号、姓名、性别 大学生类信息，学号、姓名、性别、专业 研究生类信息，学号、姓名、性别、专业、导师
Output
学生类信息 大学生类信息 研究生类信息
Sample Input
1 liu female 2 chen female cs 3 li male sc wang
Sample Output
no: 1 name: liu sex: female no: 2 name: chen sex: female major: cs no: 3 name: li sex: male major: sc supervisor: wang li is doing research
import java.util.Scanner;
public class Main{
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int no = scan.nextInt();
String name = scan.next();
String sex = scan.next();
Student s = new Student(no, name, sex);
s.print();
no = scan.nextInt();
name = scan.next();
sex = scan.next();
String major = scan.next();
CollegeStudent c = new CollegeStudent(no, name, sex, major);
c.print();
no = scan.nextInt();
name = scan.next();
sex = scan.next();
major = scan.next();
String supervisor = scan.next();
GraduateStudent g = new GraduateStudent(no, name, sex, major, supervisor );
g.print();
g.doResearch();
scan.close();
}
}
class Student{
private int no;
private String name;
private String sex;
public Student(int no, String name, String sex)
{
this.no = no;
this.name = name;
this.sex = sex;
}
public void setNo(int n)
{
no = n;
}
public void setName(String na)
{
name = na;
}
public void setSex(String s)
{
sex = s;
}
public int getNo()
{
return no;
}
public String getName()
{
return name;
}
public String getSex()
{
return sex;
}
public void print()
{
System.out.println("no: "+no);
System.out.println("name: "+name);
System.out.println("sex: "+sex);
}
}
class CollegeStudent extends Student{
private String major;
public CollegeStudent(int no, String name,String sex,String major)
{
super(no,name,sex);
this.major = major;
}
public void setMajor(String m)
{
major = m;
}
public String getMajor()
{
return major;
}
public void print()
{
super.print();
System.out.println("major: "+major);
}
}
class GraduateStudent extends CollegeStudent{
private String supervisor;
public GraduateStudent(int no,String name,String sex,String major,String supervisor)
{
super(no,name,sex,major);
this.supervisor = supervisor;
}
public void setSupervisor(String s)
{
supervisor = s;
}
public String getSuprtvisor()
{
return supervisor;
}
public void print()
{
super.print();
System.out.println("supervisor: "+supervisor);
}
public void doResearch()
{
System.out.println(getName()+ " is doing research");
}
}