Java 休息构造函数继承

Question

我在我的构造函数中遇到了这个问题，我希望能够从供应商那里获取 supplierName class 并将其添加到产品中。

public class Product {

    private long id;
    private long barcode;
    private String description;
    private String zone;
    private int quantity;

    Supplier supplierName;


    public Product(){


    }

    public Product(long id, long barcode, String description, String zone,
                   int quantity, Supplier supplierName) {
        super();
        this.id = id;
        this.barcode = barcode;
        this.description = description;
        this.zone = zone;
        this.quantity = quantity;
        this.supplierName = supplierName;

    }

但问题出在我获得产品服务时class

public class ProductService {

    private Map<Long, Product> products = DatabaseClass.getProducts();

    public ProductService(){
        products.put(1L,new Product(1,1,"Lighter","Gift",5000,"Supplier1"));
        products.put(2L,new Product(2,2,"Lighter","Gift",3500,"supplier2"));

    }

它给我一个关于 supplier1 & supplier2 的错误。

如有任何帮助，我们将不胜感激。

Answer 1

您在 "Supplier1" 和 Supplier2 中提供字符串，而构造函数需要对象 "Supplier"

Answer 2

如果您编辑代码的格式，您可以清楚地看到您尝试将字符串 "Supplier1" 和 "supplier2" 解析为接受 Supplier 作为对象的构造函数类型。

如果您定义了 class Supplier，请将构造函数调用更改为：

products.put(2L,new Product(2,2, "Lighter","Gift",3500,new Supplier(...)));

或者如果供应商应该是字符串，请更改其声明和构造函数。

private String supplier;

public Product(long id, long barcode, String description, String zone, int quantity, String supplier) { .... }

所有情况下的结论是：请格式化！ :)

Java 休息构造函数继承

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