Java Inventory Program problems

I have 2 error messages that I am having trouble figuring out what it is asking me for. The errors are:

DesktopInventory ProgramInventoryPart1.java:93: cannot find symbol
symbol  : variable printer
location: class InventoryPart1
        System.out.println("Item Number: " + printer.getItemNumber());

DesktopInventory ProgramInventoryPart1.java:95: cannot find symbol
symbol  : variable printer`enter code here`
location: class InventoryPart1
        System.out.println("Product Name: " + printer.getProductName());

The code so far is

import java.text.NumberFormat;
import java.util.locale;
import java.util.Scanner;

class Printer {

    private String itemNumber;
    private String productName;
    private double units;
    private double unitPrice;
    private double unitsTotal;
    //constructor
    public Printer (String itemNumber, String productName, double units, double unitsTotal) {
        setItemNumber(itemNumber);
        setProductName(productName);
        setUnits(units);
        setUnitPrice(unitPrice);
        unitsTotal = units ++;
    }

    //accessor methods for class variables
    public String getItemNumber () {
        return itemNumber;
    }

    public void setItemNumber (String itemNumber) {
        this.itemNumber = itemNumber;
    }

    public String getProductName () {
        return productName;
    }

    public void setProductName (String productName) {
        this.productName = productName;
    }

    public double getUnits () {
        return units;
    }

    public void setUnits (double units) {
        this.units = units;
    }

    public double getUnitPrice () {
        return unitPrice;
    }

    public void setUnitPrice (double unitPrice) {
        this.unitPrice = units * unitPrice;
    }

    public double getUnitsTotal () {
        return unitsTotal;
    }

    public void setUnitsTotal (double unitsTotal) {
        this.unitsTotal = units ++;
    }


}

public class InventoryPart1 {

    public static void main (String args[]) {


        int units;

        double unitPrice;

        double unitsTotal;
        unitsTotal = units ++;

        double unitsPrice;
        unitsPrice = units * unitPrice;

        double unitsTotalPrice;
        unitsTotalPrice = unitsTotal * unitPrice;

        double totalInventory;
        totalInventory = unitsTotal * unitsTotalPrice;


        NumberFormat nf = NumberFormat. getCurrencyInstance(Locale.US);

        //create an instance of the Printer class
        Printer epson = new Printer ("Epson579", "All In One", 2, 50.99);

        //use the methods from class Printer to output the inventory details.
        System.out.println("Item Number: " + printer.getItemNumber());

        System.out.println("Product Name: " + printer.getProductName());

        System.out.print("Number of Units: ");
        System.out.println(nf.format(units));

        System.out.print("Unit Price: ");
        System.out.println(nf.format(unitPrice));

        System.out.print("Units Total: ");
        System.out.println(nf.format(unitsTotal));

        System.out.print("Units Total Price: ");
        System.out.println(nf.format(unitsTotalPrice));

        System.out.print("Total Inventory: ");
        System.out.println(nf.format(totalInventory));
    }

}

Sorry new to this site and still trying to figure things out with the whole code entering,

---

Ah, you did not declare a variable called printer . You called it epson .

---

There were a couple of issues with your InventoryPart1 class, it wouldn't compile for me until I initialized the variables at the start of main. It's a good habit to get into, also you needed to use 'epson' and not 'printer':

public class InventoryPart1 {

    public static void main (String args[]) {


        int units = 0;

        double unitPrice = 0;

        double unitsTotal = units++;

        double unitsPrice = 0;
        unitsPrice = units * unitPrice;

        double unitsTotalPrice;
        unitsTotalPrice = unitsTotal * unitPrice;

        double totalInventory;
        totalInventory = unitsTotal * unitsTotalPrice;


        NumberFormat nf = NumberFormat.getCurrencyInstance(Locale.US);

        //create an instance of the Printer class
        Printer epson = new Printer ("Epson579", "All In One", 2, 50.99);

        //use the methods from class Printer to output the inventory details.
        System.out.println("Item Number: " + epson.getItemNumber());

        System.out.println("Product Name: " + epson.getProductName());

        System.out.print("Number of Units: ");
        System.out.println(nf.format(units));

        System.out.print("Unit Price: ");
        System.out.println(nf.format(unitPrice));

        System.out.print("Units Total: ");
        System.out.println(nf.format(unitsTotal));

        System.out.print("Units Total Price: ");
        System.out.println(nf.format(unitsTotalPrice));

        System.out.print("Total Inventory: ");
        System.out.println(nf.format(totalInventory));
    }
}

---

Couple of issues ...

instance name should be printer and not epson

total no of units should be a static field instead of instance variable

either initialize all the local variables before using them or delete them as you can calculate statistics using member methods from Printer class

When displaying use all the member methods from Printer class instead of local variables

Use NumberFormat.getIntegerInstance for formatting integers as NumberFormat.getCurrencyInstance is for formatting currency fields.

You would need to rethink on the units, unitsTotal, units price and inventory fields.

import java.text.NumberFormat;
import java.util.Locale;

class Printer {

    private String itemNumber;
    private String productName;
    private double units;
    private double unitPrice;
    private static double unitsTotal;

    // constructor
    public Printer(String itemNumber, String productName, double units, double unitPrice) {
        setItemNumber(itemNumber);
        setProductName(productName);
        setUnits(units);
        setUnitPrice(unitPrice);
        unitsTotal += units;
    }

    // accessor methods for class variables
    public String getItemNumber() {
        return itemNumber;
    }

    public void setItemNumber(String itemNumber) {
        this.itemNumber = itemNumber;
    }

    public String getProductName() {
        return productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    public double getUnits() {
        return units;
    }

    public void setUnits(double units) {
        this.units = units;
    }

    public double getUnitPrice() {
        return unitPrice;
    }

    public void setUnitPrice(double unitPrice) {
        this.unitPrice = unitPrice;
    }

    public static double getUnitsTotal() {
        return unitsTotal;
    }
}

public class InventoryPart1 {

    public static void main(String args[]) {
        NumberFormat nf = NumberFormat.getCurrencyInstance(Locale.US);
        NumberFormat inf = NumberFormat.getIntegerInstance(Locale.US);

        // create an instance of the Printer class
        Printer printer = new Printer("Epson579", "All In One", 2, 50.99);

        // use the methods from class Printer to output the inventory details.
        System.out.println("Item Number      : " + printer.getItemNumber());
        System.out.println("Product Name     : " + printer.getProductName());
        System.out.println("Number of Units  : " + inf.format(printer.getUnits()));
        System.out.println("Unit Price       : " + nf.format(printer.getUnitPrice()));
        System.out.println("Units Total      : " + inf.format(printer.getUnitsTotal()));
        System.out.println("Units Total Price: " + nf.format(printer.getUnitPrice() * Printer.getUnitsTotal()));
        System.out.println("Total Inventory  : " + inf.format(Printer.getUnitsTotal()));
    }
}

Sample Run:

Item Number      : Epson579
Product Name     : All In One
Number of Units  : 2
Unit Price       : $50.99
Units Total      : 2
Units Total Price: $101.98
Total Inventory  : 2

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