Question

我是Java的新手，我必须编写一个程序来获取用户详细信息，如下所示：


Author’s Details
****************
Name: J. Beans

YOB: 1969

Age: 41

Book Details

************

       Title: *Wonderful Java*
       ISBN: *978 0 470 10554 9*
       Publisher: *Wiley*

这就是我所做的，但它不起作用，任何人都可以帮我找出问题吗？

import java.util.Scanner ;
public class UserDetails
{
public static void main(String args[])
{
    System scan = new Scanner(System.in);
    input sname, fname, born, title, isbn, publisher;
    System.out.print("Please enter author's surname:");
    sname = input.nextLine();
    System.out.print("Please the initial of author's first name:");
    fname = input.nextLine();
    System.out.print("Please enter the year the author was born:");
    born = input.nextLine();
    System.out.print("Please enter the author's book title:");
    title = input.nextLine();
    System.out.print("Please enter the book's ISBN:");
    isbn = input.nextLine();
    System.out.print("Please enter the publisher of the book:");
    publisher = input.nextLine;

    System.out.println("Author's detail");
    System.out.println("**********************");
    System.out.println("Name:" + fname + sname);
    System.out.println("YOB:" + born);
    System.out.println("Age" + born);
    System.out.println("Book Details");
    System.out.println("**********************");
    System.out.println("Title:" + "*" + title + "*");
    System.out.println("ISBN:" + "*" + isbn + "*");
    System.out.println("Publisher:" + "*" + publisher + "*");
  }
}

Answer 1

除此之外，改变这个：

  System scan = new Scanner(System.in);
  input sname, fname, born, title, isbn, publisher;

到此：

  Scanner input = new Scanner(System.in);
  String sname, fname, born, title, isbn, publisher;

另见：

Java语言：

How to declare variables

API：

如果您真的非常认真学习如何编程，请遵循每个人的建议并：

阅读书籍。
学习tutorials。
使用IDE（Eclipse是一个很好的，它是free to download）
练习很多。
提出很多问题。

Answer 2

嗨，你只是错误地使用了类。你的代码应该是

import java.util.Scanner;

public class UserDetails {
    public static void main(String args[]) {
        Scanner scan = new Scanner(System.in);
        String sname, fname, born, title, isbn, publisher;
        System.out.print("Please enter author's surname:");

        sname = scan.nextLine();
        System.out.print("Please the initial of author's first name:");
        fname = scan.nextLine();
        System.out.print("Please enter the year the author was born:");
        born = scan.nextLine();
        System.out.print("Please enter the author's book title:");
        title = scan.nextLine();
        System.out.print("Please enter the book's ISBN:");
        isbn = scan.nextLine();
        System.out.print("Please enter the publisher of the book:");
        publisher = scan.nextLine();

        System.out.println("Author's detail");
        System.out.println("**********************");
        System.out.println("Name:" + fname + sname);
        System.out.println("YOB:" + born);
        System.out.println("Age" + born);
        System.out.println("Book Details");
        System.out.println("**********************");
        System.out.println("Title:" + "*" + title + "*");
        System.out.println("ISBN:" + "*" + isbn + "*");
        System.out.println("Publisher:" + "*" + publisher + "*");
    }
}

Answer 3

您的代码充满了语法和语义错误。这有效：

 import java.util.Scanner ;
  public class UserDetails {
  public static void main(String args[])
  {
  Scanner scan = new Scanner(System.in);
  String sname, fname, born, title, isbn, publisher;
  System.out.print("Please enter author's surname:");
  sname = scan.nextLine();
  System.out.print("Please the initial of author's first name:");
  fname = scan.nextLine();
  System.out.print("Please enter the year the author was born:");
  born = scan.nextLine();
  System.out.print("Please enter the author's book title:");
  title = scan.nextLine();
  System.out.print("Please enter the book's ISBN:");
  isbn = scan.nextLine();
  System.out.print("Please enter the publisher of the book:");
  publisher = scan.nextLine();

  System.out.println("Author's detail");
  System.out.println("**********************");
  System.out.println("Name:" + fname + sname);
  System.out.println("YOB:" + born);
  System.out.println("Age" + born);
  System.out.println("Book Details");
  System.out.println("**********************");
  System.out.println("Title:" + "*" + title + "*");
  System.out.println("ISBN:" + "*" + isbn + "*");
  System.out.println("Publisher:" + "*" + publisher + "*");
  }
  }

Answer 4

你很亲密，但你有几个错误和错字。

系统扫描=新扫描仪（System.in）; 这应该是：扫描仪扫描=新扫描仪（System.in）; 你在这里做的是创建一个名为scan的扫描器类型的新对象引用 - 而不是System。

下一个问题：输入sname，fname，born，title，isbn，publisher; 这又是类型的声明问题。这些变量中的每一个都是一个字符串引用 - 应该将其声明为; String sname，fname，born，title，isbn，publisher;

最后，你有一个错字： publisher = input.nextLine; 你忘了（）表示这是一个函数调用。应该： publisher = input.nextLine（）;

可能还有其他一些更微妙的问题，但这应该让你的代码至少可以编译和运行:)。

Java获取用户详细信息

4 个答案:

Java语言：

API：