试图弄清楚如何将数组对象数据传递给单独的方法

Question

好的，伙计们，我对java和编程是全新的，我已经能够完成我的课上的家庭作业。但我需要为我的最后一个项目创建一个程序。这只是它的开始，但我决定写一个程序，记录酒吧库存，因为我是一个酒保。我不知道如何将“LiquorCost”和“LiquorCount”数据传递给main方法下面的“getCostTotal”方法。我绝对肯定这是一件相当简单的事情，我做错了，但我就是想不出来。任何帮助都很感激。

我的酒类是独立的，如果有必要，我可以发布它，但我不认为是这个类给我带来了问题，它是在检索从数组输入到独立方法的数据。

public static void main(String[] args)  {
    System.out.println("How many bottles are you taking inventory of?: ");
    Scanner keyboard = new Scanner(System.in);
    int size = keyboard.nextInt();
    Liquor[] inv = new Liquor[size];
    
    for (int i = 0; i < inv.length; i++)  {
        inv[i] = new Liquor();
        System.out.println("Enter product name: ");
        inv[i].setLiquorName(keyboard.next());
        System.out.println("Enter the count for the product: ");
        inv[i].setLiquorCount(keyboard.nextDouble());
        System.out.println("Enter the cost for the product: ");
        inv[i].setLiquorCost(keyboard.nextDouble());
    }
    
    System.out.println("The sitting inventory cost of these products is: ");
    //double totalCost = 0
    for (Liquor inv1 : inv) {
        System.out.println(inv1.getLiquorName() + ": $" + inv1.getLiquorCost() * inv1.getLiquorCount());
    }
    
    double costTotal = GetCostTotal(Liquor[] inv, double liquorCost, double liquorCount);        
    System.out.println("The total cost of the inventory is: " 
        + costTotal);
    
    System.exit(0);
    
}

public static double GetCostTotal(Liquor[] inv, double liquorCost, double liquorCount)  {
    double costTotal = 0;
    for ( int i = 0; i < inv.length; i++)   {  
        costTotal += (liquorCost * liquorCount);
    }
    return costTotal;
}

}

Answer 1

试试这个

    public static void main(String[] args)  {
        System.out.println("How many bottles are you taking inventory of?: ");
        Scanner keyboard = new Scanner(System.in);
        int size = keyboard.nextInt();
        Liquor[] inv = new Liquor[size];
        
        for (int i = 0; i < inv.length; i++)  {
            inv[i] = new Liquor();
            System.out.println("Enter product name: ");
            inv[i].setLiquorName(keyboard.next());
            System.out.println("Enter the count for the product: ");
            inv[i].setLiquorCount(keyboard.nextDouble());
            System.out.println("Enter the cost for the product: ");
            inv[i].setLiquorCost(keyboard.nextDouble());
        }
        
        System.out.println("The sitting inventory cost of these products is: ");
        //double totalCost = 0
        for (Liquor inv1 : inv) {
            System.out.println(inv1.getLiquorName() + ": $" + inv1.getLiquorCost() * inv1.getLiquorCount());
        }
        
        double costTotal = GetCostTotal(inv);
        System.out.println("The total cost of the inventory is: " 
            + costTotal);
        
        System.exit(0);
        
    }
    
    public static double GetCostTotal(Liquor[] inv)  {
        double costTotal = 0;
        for ( int i = 0; i < inv.length; i++)   {  
            costTotal += (inv[i].getLiquorCost() * inv[i].getLiquorCount());
        }
        return costTotal;
    }