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类中的Construtor Drink Drink不能应用于给定类型

constructor class string java

Kamran Ali · 技术社区 · 3 年前

我面临一个错误。代码包含两个类,一个是Store,另一个是Drink。目的是计算总成本。我已经根据给出的UML类图编写了代码。我根据它声明了类和变量。

错误是:

constructor Drink in class Drink cannot be applied to given types;

Drink firstOrder=new Drink();
                         ^
  required: String,double
  found: no arguments
  reason: actual and formal argument lists differ in length

public class Store
{

    private Drink orderOne;
    private Drink orderTwo;
    public Store(String name,double cost,String nameone,double costone)
    {
        Drink firstOrder=new Drink();
        firstOrder.orderOne=name;
        firstOrder.orderOne=cost;
        Drink secondOrder=new Drink();
        secondOrder.orderTwo=nameone;
        secondOrder.orderTwo=costone; 
    }
    
    public static void main(String args[]) {
        Store s1=new Store("Lemon Tea",5.25,Coffe,3.99);
        Drink d2=new Drink("Lemon Tea",5.25);
        Drink d2=new Drink("Coffe",3.99);
        s1.printReport();
    }

    void printReport()
    {
        Drink dr=new Drink();
        dr.printDrink();
        dr.getCost();
    }
}

class Drink{
    private String name;
    private double cost;

    public Drink(String name2,double cost2)
    {
        name=name2;
        cost=cost2;
    }

    void printDrink()
    {
        store obj;
        System.out.println("Drink order one is ");
        System.out.print(obj.name);
        System.out.print("( " );
        System.out.print(cost);
        System.out.print(")");
        System.out.println("Drink order two is ");
        System.out.print(obj.nameOne);
        System.out.print("( " );
        System.out.print(costOne);
        System.out.print(")");
    }

    double getCost()
    {
        store obj1;
        double total;
        total=obj1.cost+obj1.cost1;
        System.out.println("Total Cost : $ "+ total);
    }
}

1 回复 | 直到 3 年前

Marc Le Bihan 3 年前

添加 public Drink() {} 构造函数到您的 Drink

class Drink{
    private String name;
    private double cost;

   public Drink() {
   }

   public Drink(String name2,double cost2) {
       name=name2;
       cost=cost2;
    }

    void printDrink() {
        store obj;
        System.out.println("Drink order one is ");
        System.out.print(obj.name);
        System.out.print("( " );
         System.out.print(cost);
         System.out.print(")");
       System.out.println("Drink order two is ");
        System.out.print(obj.nameOne);
        System.out.print("( " );
         System.out.print(costOne);
         System.out.print(")");
    }

    double getCost() {
        store obj1;
        double total;
        total=obj1.cost+obj1.cost1;
        System.out.println("Total Cost : $ "+ total);
    }
}

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