Java 扫描仪问题，输入信息不工作

问题是，我无数次地查看代码，可能我只是看不到简单的答案，但为什么在作者姓名和作者姓氏方面，系统会这样打印出来：

Enter author Name: Enter author Surname: 

应该是这样的

Enter author Name: 
Enter author Surname:

若我在系统中输入信息，只记得作者的名字，我不能输入姓氏信息

import java.util.Scanner;

public class BookTest {

    public static void main(String[] args) {    

        Scanner scan = new Scanner (System.in);

        Book bookIn = new Book();

        System.out.print("Enter book title: ");
        bookIn.setTitleBook(scan.nextLine());



        System.out.print("Enter author Name: ");
        bookIn.setFirstName(scan.nextLine());

        System.out.print("Enter author Surname: ");
        bookIn.setSecondName(scan.nextLine());

        System.out.print("Enter author Nationality: ");
        bookIn.setNationality(scan.nextLine());




        System.out.print("Enter book price: ");
        bookIn.setPriceBook(scan.nextDouble());

        System.out.print("Enter book ISBN: ");
        bookIn.setIsbn(scan.nextInt());




        System.out.println("Title: " +bookIn.getTitleBook());
        System.out.println("Author: "+ bookIn.getFirstName()+ " " + bookIn.getSecondName());
        System.out.println("Price: "+bookIn.getPriceBook());
        System.out.println("ISNB Number: "+bookIn.getIsbn());
        System.out.println("Aurhor Nationality: " + bookIn.getNationality());



    }
}

图书班

public class Book {

    private double priceBook;
    private int isbn;
    private String titleBook;
    private String firstName;
    private String secondName;
    private String nationality;


    public void setTitleBook(String titleBook){
        this.titleBook = titleBook;
    }
    public String getTitleBook(){
        return titleBook;
    }


    public void setPriceBook(double priceBook) {
        this.priceBook = priceBook;
    }
    public double getPriceBook() {
        return priceBook;
    }


    public void setIsbn(int isbn) {
        this.isbn = isbn;
    }
    public int getIsbn() {
        return isbn;
    }



    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getFirstName() {
        return firstName;
    }




    public void setSecondName(String secondName) {
        this.secondName = secondName;
    }
    public String getSecondName() {
        return secondName;
    }


    public void setNationality(String nationality) {
        this.nationality = nationality;
    }
    public String getNationality() {
        return nationality;
    }



}

---

读取ISBN后，将扫描仪移至下一行。使用Scanner.nextInt时，输入仅读取数字，而不读取按enter键时创建的新行字符。在

Scanner.nextInt

之后调用

Scanner.nextLine

读取新行字符并清除缓冲区

import java.util.Scanner;

public class BookTest {

    public static void main(String[] args) {    

        Scanner scan = new Scanner (System.in);

        Book title = new Book();
        Book price = new Book();
        Book isbn = new Book();
        Book fName = new Book();
        Book sName = new Book();
        Book nation = new Book();

        System.out.print("Enter book title: ");
        title.setTitleBook(scan.nextLine());

        System.out.print("Enter book price: ");
        price.setPriceBook(scan.nextDouble());

        System.out.print("Enter book ISBN: ");
        isbn.setIsbn(scan.nextInt());

        scan.nextLine(); //NOTICE CHANGE HERE
        //System.out.println(); THIS WAS REMOVED


        System.out.print("Enter author Name: ");
        fName.setFirstName(scan.nextLine());

        System.out.print("Enter author Surname: ");
        sName.setSecondName(scan.nextLine());

        System.out.print("Enter author Nationality: ");
        nation.setNationality(scan.nextLine());


    System.out.println("Title: " +title.getTitleBook());
    System.out.println("Price: "+price.getPriceBook());
    System.out.println("ISNB Number: "+isbn.getIsbn());

    System.out.println("Author: "+ fName.getFirstName() + sName.getSecondName());
    System.out.println("Aurhor Nationality: " + nation.getNationality());



    }
}

---

是这样的吗？Scanner scaner=新扫描仪（System.in）；System.out.print（“输入作者姓名：”）；fName.setFirstName（scaner.nextLine（））；System.out.print（“输入作者姓名：”）；sName.setSecondName（scaner.nextLine（））；系统输出打印（“输入作者国籍：”）；nation.setNational（scaner.nextLine（））；它应该会起作用。我不确定你在这篇评论中到底问了什么。请在我发布的解决方案中查找“注意此处的更改”的注释。如果可能，请解释原因。。。。它不能与一台扫描仪一起工作（实际上它只在一个阶段出现bug，我不太明白为什么）？我想你可能希望在同一个图书对象中包含这些信息。不要创建六个不同的Book对象，只创建一个并调用该对象上的setter方法。对不起，你能解释一下吗？当然。您有一个包含6个字段的Book对象。现在在测试代码中，您将创建六个不同的对象，并在每个对象中设置一个字段。但是你可能需要做的是在同一个对象中设置所有六个字段。是这样的吗？我编辑我的代码。。。