两道题不会，有不有会的帮忙解一下

已解决，如有帮助采纳一下哦。点击我回答右上角的【采纳】按钮。

//学生类
public class Student {
    private String sno;
    private String sname;
    private String sex;

    public Student(String sno, String sname, String sex) {
        this.sno = sno;
        this.sname = sname;
        this.sex = sex;
    }
    public String display(){
        return "学号："+sno+"，姓名："+sname+",性别："+sex;
    }
}


//学生测试类
public class StudentTest {
    public static void main(String[] args) {
        Student student=new Student("10001","小白","22");
        System.out.println(student.display());
    }
}


//图书类
public class Book {
    private String bno;
    private String bname;
    private double price;

    public Book(String bno, String bname, double price) {
        this.bno = bno;
        this.bname = bname;
        this.price = price;
    }

    public String display(){
        return "书号："+bno+"，书名："+bname+",价格："+price;
    }
}

//图书测试类
public class BookTest {
    public static void main(String[] args) {
        Book book=new Book("20001","java从入门到精通",88.96);
        System.out.println(book.display());
    }
}

您好，我是有问必答小助手，您的问题已经有小伙伴解答了，您看下是否解决，可以追评进行沟通哦~

如果有您比较满意的答案 / 帮您提供解决思路的答案，可以点击【采纳】按钮，给回答的小伙伴一些鼓励哦～～

ps:问答VIP仅需29元，即可享受5次/月 有问必答服务，了解详情>>>https://vip.csdn.net/askvip?utm_source=1146287632