Beginner Java Question

[chancock82]

Please Help!

Write a Java application that prompts the user for pairs of inputs of a product number (1-5), and then an integer quantity of units sold. You must use a switch statement and a sentinel-controlled loop (i.e. a loop that stops execution when an out of range value, such as -1, is input). All 15 items below are for a single purchase. There are five sets of inputs as follows:

Product 1 1 unit (cost is $2.98 per unit)
Product 2 2 units (cost is $4.50 per unit)
Product 3 3 units (cost is $9.98 per unit)
Product 4 4 units (cost is $4.49 per unit)
Product 5 5 units (cost is $6.87 per unit)

Your application must calculate and display the total retail value of all products sold, after all 5 pairs of inputs are completed. You must also display the total after each new pair of input values is entered.

Here is what I have so far...It works ,however, I want to add in the final message window the total of the entire order.

    // Sales.java  
    // Program calculates sales, based on an input of product  
    // number and quantity sold  
      
    import java.awt.*;  
    import java.text.NumberFormat;  
    import java.util.Locale;  
    import javax.swing.*;  
      
    public class Sales {  
      
        public static void main( String args[] )  
    {  
        float product1 = 0, product2 = 0, product3 = 0;  
        float product4 = 0, product5 = 0;  
      
        String inputString;  
      
        int productId = 1;  
        int totalCost = 0;  
          
        // ask user for product number until flag value entered  
        while (productId != 0) {  
      
            // determine the product chosen  
            inputString = JOptionPane.showInputDialog(  
                "Enter product number (1-5) 0 to Quit:" );  
            productId = Integer.parseInt( inputString );  
      
            if ( productId >= 1 && productId <= 5 ) {  
      
                // determine the number sold of the item  
                inputString = JOptionPane.showInputDialog(  
                "Enter quantity:" );  
                int quantity = Integer.parseInt( inputString );  
      
                // Calculate the total for the item by the  
                // price times the quantity sold  
                switch ( productId ) {  
              
                    case 1:  
                    product1 += quantity * 2.98;  
                    break;  
      
                    case 2:  
                    product2 += quantity * 4.50;  
                    break;  
                  
                    case 3:  
                    product3 += quantity * 9.98;  
                    break;  
      
                    case 4:  
                    product4 += quantity * 4.49;  
                    break;  
      
                    case 5:  
                    product5 += quantity * 6.87;  
                    break;  
                      
                }  
      
            }  
      
            else if ( productId != 0 ) {  
                JOptionPane.showMessageDialog( null,  
                    "Product number must be between 1 and 5 or -1 to Quit",  
                    "Input Error", JOptionPane.INFORMATION_MESSAGE );  
            }  
        }  
      
      
            // create decimal format to format floating point numbers  
            // with two digits to the right of the decimal point  
            NumberFormat moneyFormat =  
                NumberFormat.getCurrencyInstance( Locale.US );  
      
            // create a summary message  
            String output = "Product 1: " + moneyFormat.format( product1 );  
            output += "\nProduct 2: "+ moneyFormat.format( product2 );  
            output += "\nProduct 3: " + moneyFormat.format( product3 );  
            output += "\nProduct 4: " + moneyFormat.format( product4 );  
            output += "\nProduct 5: " + moneyFormat.format( product5 ) + "\n";  
      
            JTextArea outputArea = new JTextArea( 6, 20 );  
            outputArea.setText( output );  
      
            // show results  
            JOptionPane.showMessageDialog( null, outputArea,  
                "Totals", JOptionPane.INFORMATION_MESSAGE );  
      
            System.exit( 0 );  
        }  
      
    } // end class Sales

[pbrockway2]

Hi chancock82, welcome to the forums!

When you post code, use the "code" tags. You put [code] at the start of the code and [/code] at the end. That way the code will be more readable when it appears here.

I want to add in the final message window the total of the entire order.

What is the problem - figuring out the total? or adding it to the dialog?

[chancock82]

Figuring out the total and outputting it on the window that shows the totals of the products

[chancock82]

Sorry for the mess up on the code tags NEWBIE

[pbrockway2]

You have variables that represent the totals for each of the products: so just add them together. As for outputing the result, you can add a line to the output string.