java 面向对象 设计一个学生student类

设计一个学生student类 包含类的属性：姓名 学号 班级 性别 年龄 性格
输入1
获取姓名
输入2获取学号
输入3获取班级
以此类推
实在是 菜 道理都懂 还是 写不出来

package com.eleven;

import java.util.Scanner;

/**
 * @author eleven
 * @date 2021/7/14 11:40
 * @apiNote 学生类
 */
public class Student {
    private String name;
    private String no;
    private String clazz;
    private String sex;
    private String age;
    private String character;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getNo() {
        return no;
    }

    public void setNo(String no) {
        this.no = no;
    }

    public String getClazz() {
        return clazz;
    }

    public void setClazz(String clazz) {
        this.clazz = clazz;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public String getCharacter() {
        return character;
    }

    public void setCharacter(String character) {
        this.character = character;
    }

    public Student(String name, String no, String clazz, String sex, String age, String character) {
        this.name = name;
        this.no = no;
        this.clazz = clazz;
        this.sex = sex;
        this.age = age;
        this.character = character;
    }

    public Student() {
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", no='" + no + '\'' +
                ", clazz='" + clazz + '\'' +
                ", sex='" + sex + '\'' +
                ", age='" + age + '\'' +
                ", character='" + character + '\'' +
                '}';
    }

    public static void main(String[] args){
        Student stu = new Student("张三","001","软工一班","男","18","内向");
        Scanner scanner = new Scanner(System.in);
        while (true){
            String str = "";
            switch (scanner.next()){
                case "1":
                    str = "学生名称：" + stu.getName();
                    break;
                case "2":
                    str = "学生学号：" + stu.getNo();
                    break;
                case "3":
                    str = "学生班级：" + stu.getClazz();
                    break;
                case "4":
                    str = "学生性别：" + stu.getSex();
                    break;
                case "5":
                    str = "学生年龄：" + stu.getAge();
                    break;
                case "6":
                    str = "学生性格：" + stu.getCharacter();
                    break;
                case "-1":
                    System.out.println("系统退出");
                    System.exit(0);
                default :
                    str = "学生信息：" + stu;
                    break;
            }
            System.out.println(str);
        }
    }
}

那是你环境配的有问题