Calling a method in java and returning beer cost

Question

What I am supposed to do:

Add some necessary statements to the printOrderCost() method in the main class so that this method computes and p

Answer 1

Your code looks fine to me. To call getCost() in toString() method, simply just call it with getCost().

So your toString() method should be something like this:

public toString(){
    String s;
    s = brand + " ";
    s += quantity + " " ;
    s += itemCost + " ";
    s += getCost();

    return s;
}

Hope this is what you're looking for :)

Answer 2

From the code you have supplied, the getCost method "looks" fine

Your toString method should simply need to be appended to your return String s

public String toString()  // not necessary to format the output
{
    String s;
    s = brand + " ";
    s += quantity + " " ;
    s += itemCost + " ";
    s += getCost();
    return s;
}

You might also like to take a look at NumberFormat, which will allow you to control the output format, just in case you get a funny looking value ;)

Answer 3

It is generally a bad idea to add strings up like you did, as Java will create a unique String for each addition, which causes some unnecessary overhead. You can either use a StringBuilder as a general-purpose tool, or, if you know the exact format of how the String should look like, you can use String.format(...).

Example:

public toString() {
  return String.format("%-10s %2d %6.2f %6.2f", brand, quantity, itemCost, getCost());
}