Java错误: Input automatically go to next line without input yet

Question

我有一个 bug (截屏)与我的程序。我想输入书名，但程序自动接受“无”，然后转到下一行。请在这里查看我的代码:

System.out.println("Book Management System");
System.out.println("1. Add book");
System.out.println("2. Delete book");
System.out.println("3. Update book information");
System.out.print("Enter your choice: ");
        choice = input.nextInt();

        switch (choice)
        {
            case 1:
                System.out.println("Add a new book");
                System.out.print("Enter title: ");
                book_title = input.nextLine();
                System.out.print("Enter author: ");
                book_author = input.nextLine();
                System.out.print("Enter publisher: ");
                book_publisher = input.nextLine();
                addBook(connection, preparedStatement, book_title, book_author, book_publisher);
                break;

等等...这是我的 addBook 方法

 public static void addBook(Connection connection, PreparedStatement preparedStatement, String name, String author, String publisher) throws SQLException{
    preparedStatement = connection.prepareStatement("INSERT INTO books.book_info (book_title, book_author, book_publisher) VALUES (?,?,?)");
    preparedStatement.setString(1, name);
    preparedStatement.setString(2, author);
    preparedStatement.setString(3, publisher);
    preparedStatement.executeUpdate();
    System.out.println("Book added!");
}

这是全部code

Answer 1

查看此问题和答案；它会解决你的问题:

Scanner is skipping nextLine() after using next(), nextInt() or other nextFoo() methods