使用两个参数构造函数

Question

我为作者设置了一本类书的构造函数;标题;价格和页面。 一切正常。当我在第一本书上打印手动输入和结果时，当我尝试为第二本书编写手动输入时，println会直接询问标题。

我一遍又一遍地重新编码代码，它看起来像顺序，与Book1相同。我刚开始在学校学习JAVA，我们需要研究大部分练习，所以这个练习包括实际导入和使用java.util.Scanner，同时有两个参数构造函数。我搜索到了这个扫描仪发现了一个类似的问题，但显然这是一个sintax错误，如果你要求构造函数回复两次或三次，那就会有点麻烦。

**Here are some examples of my code and result:**
\\some code above ofcourse
    Scanner keyboard = new Scanner(System.in);

        //BOOK 1 manual entry.
        System.out.println("Your author1: ");
        String author1 = keyboard.nextLine();

        System.out.println("Title of your book1: " );
        String title1 = keyboard.nextLine();

        System.out.println("Price of your book1: ");
        double price1 = keyboard.nextDouble();

        System.out.println("Pages of your book1: ");
        int page1 = keyboard.nextInt();

        classbook book1 = new classbook(author1, title1, price1, page1);


        System.out.println("--------------------------------");
        book1.discount(0.20);
        System.out.println(book1);System.out.println("+ 10% added discount on your book.");

        System.out.println("--------------------------------");

    System.out.println("Your author2: ");
        String author2 = keyboard.nextLine();

        System.out.println("Title of your book2: " );
        String title2 = keyboard.nextLine();

        System.out.println("Price of your book2: ");
        double price2 = keyboard.nextDouble();

        System.out.println("Pages of your book2: ");
        int page2 = keyboard.nextInt();    



        classbook book2 = new classbook(author2, title2, price2, page2);

        System.out.println("--------------------------------");
        book2.discount(0.20);
        System.out.println(book2);System.out.println("+ 10% added discount on your book2.");

        System.out.println("--------------------------------");
        }
}

以下是结果图： “Pic1：它要求我直接输入第二行（标题）”

“Pic2：结果显示作者字段为空白，从构造函数直接调用点作为文本的结尾。