java - 我的程序跳过让用户输入一个变量的值

Question

在此程序中，我使用预设值从 CarOrder 类创建 2 个对象。然后，我要求用户提供另外 2 组值来创建另外 2 个对象。不幸的是，在输入第一个的纳税状态后，它将跳过让用户在第二个上输入买家的值。为什么它随机跳过这一个问题？

public static void main(String[] args)
{
    Scanner keyboard = new Scanner(System.in);
    CarOrder speedy = new CarOrder("Speedy Rental", "Mini Cooper", 22150, 15, true);
    CarOrder zip = new CarOrder("Zip Car Co.", "Ford Fusion", 27495, 6, true);

    System.out.println("Enter Buyer: ");
    String buyer1 = keyboard.nextLine();
    System.out.println("Enter the type of car being purchased: ");
    String car1 = keyboard.nextLine();
    System.out.println("Enter the cost of this purchase: ");
    double cost1 = keyboard.nextDouble();
    System.out.println("Enter quantity of cars being purchased: ");
    int quantity1 = keyboard.nextInt();
    System.out.println("Enter tax status: ");
    boolean tax1 = keyboard.nextBoolean();

    System.out.println("Enter Buyer: ");
    String buyer2 = keyboard.nextLine();
    System.out.println("Enter the type of car being purchased: ");
    String car2 = keyboard.nextLine();
    System.out.println("Enter the cost of this purchase: ");
    int cost2 = keyboard.nextInt();
    System.out.println("Enter quantity of cars being purchased: ");
    int quantity2 = keyboard.nextInt();
    System.out.println("Enter tax status: ");
    boolean tax2 = keyboard.nextBoolean();

    CarOrder state = new CarOrder(buyer1, car1, cost1, quantity1, tax1);
    CarOrder it = new CarOrder(buyer1, car2, cost2, quantity2, tax2);

    System.out.println("Chicago Car Wholesalers" );
    System.out.println("Oct. 30th, 2012");
    System.out.println("New Car Order Report");

}

}

Answer 1

我认为 nextBoolean() 正在消耗 boolean 值，但保留行尾字符，然后您的 nextLine() 将其用作其输入。因此，请在询问第二个买家之前添加 keyboard.nextLine()。