JAVA - 不会编译

Question

我的驱动程序类无法编译。 它一直说我给出了错误的类型。 我已经在 Phone 类中声明了变量，然后在驱动程序中创建了有关电话的信息，并希望将其存储在数组中。

电话课

public class Phone extends Technology {
    private String name;
    private String type;
    private String colour;
    private int inStock=10;
    private int sold;

    //Constructor
    public Phone (String itemsId,  String brand, double price, String name, String type, String colour ) {

        super(itemsId, brand, price );
        this.name = name;
        this.type = type;
        this.colour = colour;
    }   
}

这是无法编译的驱动程序类的一部分，我无法弄清楚我做错了什么。 我已经按照电话类中的相同顺序创建了有关电话的信息。

// Creating 10 phones and storing in arrayList
public void pickPhone(){

    Phone phone = new Phone("A223","Apple", "€679.00 ", "iPhone 5s", "Smartphone ", " Black");
    phoneList.add(phone);

    phone = new Phone("A252","Apple", " €649.00 ", " iPhone 5s", "Smartphone ", " White");
    phoneList.add(phone);

    phone = new Phone("A264","Apple", " €329.00 ", " iPhone 4s", "Smartphone ", " Black");
    phoneList.add(phone);

    phone = new Phone("S586","Sony", " €570.00 ", " Xperia Z1", "Smartphone ", " Black");
    phoneList.add(phone);

    phone = new Phone("S549","Sony", " €260.00 ", " Xperia SP", "Smartphone ", " Black");
    phoneList.add(phone);

    phone = new Phone("G359","Samsung", " €530.00 ", "Galaxy S4", "Smartphone ", " Black");
    phoneList.add(phone);

    phone = new Phone("G375","Samsung", " €530.00 ", "Galaxy S4", "Smartphone ", "White");
    phoneList.add(phone);

    phone = new Phone("G352","Samsung", "  €350.00 ", "Galaxy S4 Mini", "Smartphone ", "White");
    phoneList.add(phone);

    phone = new Phone("H488"," HTC ", " €529.00 ", "One", "Smartphone ", "Black");
    phoneList.add(phone);

    phone = new Phone("H463"," HTC ", " €419.00 ", "One Mini ", "Smartphone ", "Silver");
    phoneList.add(phone);

}

Answer 1

在你的构造函数中

public Phone (String itemsId,  String brand, double price, String name, String type, String colour ) 

price是双倍，但您传递了一个字符串，例如" €419.00 "

您必须将价格传递为例如419.0 （没有欧元符号，没有空格，周围没有双引号）。

Phone phone = new Phone("A223","Apple", 679.0, "iPhone 5s", "Smartphone ", " Black");
phoneList.add(phone);

Answer 2

您的错误在于您在电话构造函数中要求双倍而不是字符串的价格

例如“€679.00”是一个字符串。 如果你想要双倍，你必须通过 679.00

你必须修改你的构造函数或修改你的参数