How do I write a method to calculate total cost for all items in an array

Question

I m stuck  This is what I have written so far  but I don t know how to set up for a method call to prompt for the total  I need the individual totals for all items in the array to be added to get a total cost and it needs to be displayed at the end of the program  Please  any advice is helpful  I have to be to work soon and need to turn it in before I go  Thanks  MAIN FILE  package inventory2  import java util Scanner       public class RunApp           public static void main String   args             Scanner input   new Scanner  System in             Items theItem   new Items             int number          String Name            System out print  How many items are to be put into inventory count            number   input nextInt        input nextLine         Items  inv   new Items number          for int count   0  count  lt  inv length    count                                    System out print   nWhat is item     count  1      s name                                    Name   input nextLine                                theItem setName Name                        System out print  Enter     Name     s product number                                   double pNumber   input nextDouble                                theItem setpNumber pNumber                        System out print  How many     Name    s are there in inventory                                    double Units   input nextDouble                                theItem setUnits Units                        System out print Name     s cost                                  double Price   input nextDouble                                theItem setPrice  Price                        inv count    new Items Name  Price  Units  pNumber                       input nextLine                             System out print   n Product Name          theItem getName                             System out print   n Product Number          theItem getpNumber                             System out print   n Amount of Units in Stock          theItem getUnits                             System out print   n Price per Unit        theItem getPrice       n n                            System out printf   n Total cost for  s in stock     2f   theItem getName    theItem calculateTotalPrice                         System out printf  Total Cost for all items entered     2f   theItem calculateTotalPrice          i need to prompt for output to show total price for all items in array                         2ND CLASS  package inventory2       public class Items          private String Name         private double pNumber  Units  Price             public Items     Name       pNumber   0 0  Units   0 0  Price   0 0           constructor public Items String productName  double productNumber  double unitsInStock  double unitPrice        Name   productName      pNumber   productNumber      Units   unitsInStock      Price   unitPrice          setter methods public void setName String n        Name   n     public void setpNumber double no        pNumber   no     public void setUnits double u        Units   u     public void setPrice double p        Price   p       getter methods public String getName     return Name     public double getpNumber     return pNumber     public double getUnits     return Units     public double getPrice     return Price     public double calculateTotalPrice         return  Units   Price      public double calculateAllItemsTotalPrice                 i need method to calculate total cost for all items in array       return  TotalPrice

User · Answer

In your for loop you need to multiply the units * price. That gives you the total for that particular item. Also in the for loop you should add that to a counter that keeps track of the grand total. Your code would look something like

float total;
total += theItem.getUnits() * theItem.getPrice();

total should be scoped so it's accessible from within main unless you want to pass it around between function calls. Then you can either just print out the total or create a method that prints it out for you.

User · Answer

The total of 7 numbers in an array can be created as       import java util    class Sum      public static void main String arg              int a   new int 7        int total 0       Scanner n new Scanner System in        System out println  Enter the no  for total          for int i 0 i lt  6 i                   a i  n nextInt           total total a i                  System out println  The total is    total

[java] How do I write a method to calculate total cost for all items in an array?

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