125 - 学生、大学生、研究生类_提供函数attendclass(string classname)表示上课。-优快云博客

本文链接：https://blog.youkuaiyun.com/rs_seaside/article/details/83784510

本文详细介绍了如何设计和实现一个包含Student、CollegeStudent和GraduateStudent三个类的学生类层次结构。每个类都包含了相应的属性和方法，如学号、姓名、性别、专业和导师等，并提供了构造函数和getset函数。通过实例化这些类，可以测试其功能并观察输出结果。

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125 - 学生、大学生、研究生类

Time Limit: 1000 Memory Limit: 65535
Submit: 728 Solved: 426

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

HINT

Pre Append Code

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
{
	int no;
    String name;
    String sex;
    Student()
    {
    	no = 0;
    	name = null;
    	sex = null;
    };
    public Student(int no, String name, String sex)
    {
        this.name = name;
        this.no = no;
        this.sex = sex;
    }
    public void setSex(String sex)
    {
    	this.sex = sex;
    }
    public void setNo(int no) 
    {
        this.no = no;
    }

    public int getNo() {
        return no;
    }

    public String getName() 
    {
        return name;
    }

    public String getSex() 
    {
        return sex;
    }
    public void print()
    {
        System.out.println("no: "+getNo());
        System.out.println("name: "+getName());
        System.out.println("sex: "+getSex());
    }
}
class CollegeStudent extends Student 
{
    String major;
    CollegeStudent(int no, String name, String sex, String major){
        super(no,name,sex);
        this.major = major;
    }
    public String getMajor() 
    {
        return major;
    }

    public void setMajor(String major) 
    {
        this.major = major;
    }

    public void print()
    {
        super.print();
        System.out.println("major: "+major);
    }
}
class GraduateStudent extends CollegeStudent 
{
    String supervisor;
    GraduateStudent(int no, String name, String sex, String major, String supervisor){
        super(no, name, sex, major);
        this.supervisor = supervisor;
    }

    public String getSupervisor() 
    {
        return supervisor;
    }

    public void setSupervisor(String supervisor) 
    {
        this.supervisor = supervisor;
    }

    public void print()
    {
        super.print();
        System.out.println("supervisor: "+supervisor);
    }

    public void doResearch()
    {
        System.out.println(name+" is doing research");
    }
}