Please help, im so confused

Question

im trying too make a till for a shop but im getting the error 'operator * cannot be applied to int,Price total += tempItemAmount * (tempItem.getItemPrice());'
     private int printItemReceipt(ArrayList tempItems) {
         // Clone the tempItems list so that it can be picked apart
         ArrayList tempReceipt = (ArrayList)tempItems.clone();
          * Print a list of the items in a receipt format (to be sold)
          * This is done by searching through the list, when an object
          * is found, a search for other objects of the same type is
          * run, when one is found, the ammount of the object is increased
          * then the instance is removed from the list until there are no more
         // Hold the total item cost tally
         int total = 0;
             for(int i = 0; i < tempReceipt.size(); i++){
              Item tempItem = (Item)tempReceipt.get( i );
              int tempItemAmount = 0;
                  while(tempReceipt.contains(tempItem)){
                   tempItemAmount++;
                   tempReceipt.remove( tempItem );
               System.out.println( "\n" + tempItemAmount + " x " + tempItem.getItemName() );
               System.out.print(" $" + tempItem.getItemPrice() + "(x" + tempItemAmount + ")");
               System.out.print("   $" + (tempItemAmount * (tempItem.getItemPrice())) );
               total += tempItemAmount * (tempItem.getItemPrice());   <===  just here
          System.out.println("\n\nItem total = $" + total);
          System.out.println();
          return total;
      * null
      * @param tempItems
     private void checkout(ArrayList tempItems){
}and i dont know why or how to fix it any and all help is welcomed

Answer 1

its a big bit of code (well for a newbie like me any way) but here it is
import java.io.*;
import java.util.ArrayList;
import java.io.Serializable;
import java.text.StringCharacterIterator;
import java.util.*;
* This is the main class - the program is run by java Shop
public class Shop implements Serializable {
     public Shelves theShelves = new Shelves();
     public Till theTill = new Till();
     transient BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
     int balance; //holds the value from getQuatity
      * Using startUp an owner can add various goods to the system.
         * We can then can add an item, set the price and set the stock level.
     public void startUp() {
         // Stores the user's menu choices
             int choice = 0;
             String tempChoice;
     try{
                 do{
                      System.out.println("\nWelcome to the item menu. Do you wish to:");
               System.out.println("1: Add a new item");
               System.out.println("2: Set an item price");
               System.out.println("3: Set an item stock level");
               System.out.println("Esc: Back to Main Menu");
               System.out.print("\nPlease chose an option: ");
               tempChoice = buf.readLine();
               // Check for an Esc symbol and return if found
               if( tempChoice.charAt(0) == 27 ){
                   return;
                 }while(true);
               // Convert the tempChoice string to a more managable integer
               choice = Integer.parseInt( tempChoice );
               switch(choice){
                      case 1:
                                   // Create a new item which will be added to the shelves
                       createItem();
                           break;
                   case 2:
                          // Provide the user with a list of existing items to chose from, along with an index
                       System.out.println("\nPlease enter the number of the item you wish to change the price of...");
                       System.out.println( theShelves );
                       System.out.print("\nEnter number here: ");
                       // Call setItemPrice and pass the item number input from the user
                       setItemPrice( Integer.parseInt( buf.readLine() ) );
                           break;
                            case 3:
                                   // Provide the user with a list of existing items to chose from, along with an index
                       System.out.println("\nPlease enter the number of the item you wish to change the stock level of...");
                       System.out.println( theShelves );
                       System.out.print("\nEnter number here: ");
                       // Call setItemPrice and pass the item number input from the user
                       setItemStockLevel( Integer.parseInt( buf.readLine() ) );
                           break;
                            default:
                                   System.out.println("\nPlease enter a valid option");
                                       break;
          catch (IOException e){
                  System.out.println("\nThe till has suffered an IO exception "+e);
          catch(NumberFormatException e){
                  System.out.println("\nPlease enter a number only");
      * Using startTill, an owner can add the various
     * monies to the till specifying the name, value
         public void startTill(){
             // Stores the user's menu choices
              int choice = 0;
              String tempChoice;
                   do{
                          System.out.println("\nWelcome to the monies menu. Do you wish to:");
                    System.out.println("1: Add a new money type");
                    System.out.println("2: Add more of an existing money");
                    System.out.println("3: Remove monies");
                    System.out.println("Esc: Back to Main Menu");
                    System.out.print("\nPlease chose an option: ");
                           tempChoice = buf.readLine();
                    // Check for an Esc symbol and return if found
                    if( tempChoice.charAt(0) == 27 ){
                        return;
                    // Convert the tempchoice string to a more managable integer
                        choice = Integer.parseInt(tempChoice);
                    switch(choice){
                        case 1:
                                     createMoney();
                                         break;
                              case 2:
                                     setMoney(choice);
                                         break;
                              case 3:
                                     setMoney(choice);
                                         break;
                  while(true);
      * Using runTill, an owner can sell items.
         * Customers put in their order, the system
         * then tells her how much to charge.
     public void runTill() {
            // Stores the user's menu choices
             int choice = 0;
             String tempChoice;
             // Stores the list off items to be sold
             ArrayList tempItems = new ArrayList();
             while(true){
              try{
                      System.out.println("\nWelcome to the sales menu. Do you wish to:");
                   System.out.println("1: Enter name or number of item to be sold");
               System.out.println("2: Show current Receipt");
               System.out.println("3: Complete sale");
               System.out.println("4: List all items");
               System.out.println("Esc: Back to Main Menu");
               System.out.print("\nPlease chose an option: ");
                   tempChoice = buf.readLine();
               // Check for an Esc symbol and return if found
               if( tempChoice.charAt(0) == 27){
                   return;
               // Convert the tempChoice string to a more managable integer
                   choice = Integer.parseInt( tempChoice );
               switch(choice){
                            case 1:
                                   // Stores the temporary item name or number
                       String tempItemName;
                       int tempItemNumber = 0;
                       // Creates temporary storage for an item, presets to null
                       Item tempItem = null;
                       // Ask the user for the name of the item to be sold
                       System.out.print("\nPlease Enter the Name or Number of the item to sell: ");
                       tempItemName = buf.readLine();
                       // Attempt to parse an array index value (int) from the user input
                       // if a number format exception is caught the input must be a string
                       // so a different call the theList should be made to find the item
                           try{
                               if(tempItem == null){
                                tempItemNumber = Integer.parseInt( tempItemName );
                           catch (NumberFormatException e){
                               //bubble sort
                           finally{
                               if( tempItem == null ){
                                // Find the item by its indexed number
                                tempItem = theShelves.getItemByPosition( tempItemNumber );
                           // Ask the user for the number of the item(s) to be sold
                           System.out.print("\nPlease Enter how many " + tempItem.getItemName() + "(s) are to be sold: ");
                           int tempItemAmount = Integer.parseInt( buf.readLine() );
                           // For the number of items, add the item to the item ArrayList
                           for(int i = 0; i < tempItemAmount; i++){
                                tempItems.add( tempItem );
                                            break;
                            case 2:
                                   // Call printItemReceipt to print a receipt from the passed Item ArrayList
                       System.out.println("\nReceipt of current items being sold:");
                       printItemReceipt( tempItems );
                           break;
                   case 3:
                                   // Pass the item list to checkout for calculation of money totals
                       checkout( tempItems );
                                       break;
                   case 4:
                                   // Print a list of all item names along with indexes
                       System.out.println( "\n" + theShelves );
                           break;
                   default:
                                   System.out.println("\nPlease enter a valid option");
                           break;
              catch (IOException e){
                  // Print an error message to handle the IO Exception
               // (Error in receiving user input)
                   System.out.println("\nThe till has suffered an IO exception "+e);
              catch(NumberFormatException e){
                   // Print an error message to handle the NumberformatException
                   // (User has entered a none int value)
                   System.out.println("\nPlease enter a number only");
      * Using getChange, an owner can tell the systen how much of
         * each denomination she has been given by the customer and
         * the till tells her what to giveback.
       public void getChange(){
        * Using getBalance it tells the owner what is left in the
        * till and how much money has been made during the day
       public void getBalance(){
          Monies tempMonies = new Monies();
            balance = tempMonies.getQuantity();     //getQuantity returns a int value
        * runMenu provides the main menu to the shop allowing a
        *  user to select their required operation
       public void runMenu() {
           // This is the main menu which runs the whole shop
           // Stores the user's menu choices
           int choice = 0;
            String tempChoice;
            while( true ){
                    try{
                     System.out.println("\nWelcome to the main shop menu. Do you wish to:");
                 System.out.println("1: Add / Edit items");
                 System.out.println("2: Add / Edit money types");
                 System.out.println("3: Sell Items");
                 System.out.println("Esc: Exit shop program");
                 System.out.print("\nPlease chose an option: ");
                     tempChoice = buf.readLine();
                 // Check for an Esc symbol and return if found
                 if( tempChoice.charAt(0) == 27 ){
                     return;
                 // Convert the tempChoice string to a more managable integer
                     choice = Integer.parseInt( tempChoice );
                 switch(choice){
                     case 1:
                                  // Call startUp for adding and editing new items
                      startUp();
                                      break;
                           case 2:
                                  // Call startTill for adding and editing money types (coins&notes)
                      startTill();
                                      break;
                           case 3:
                                  // Call runTill for selling items
                      runTill();
                                      break;
                           default:
                                  System.out.println("\nPlease enter a valid option");
                                      break;
            catch (IOException e){
                 // Print an error message to handle the IO Exception
                 // (Error in receiving user input)
                     System.out.println("\nThe till has suffered an IO exception "+e);
            catch(NumberFormatException e){
                    // Print an error message to handle the NumberformatException
                    // (User has entered a none int value)
                    System.out.println("\nPlease enter a number only");
      * // LEAVE ALL THE CODE BELOW UNTOUCHED UNLESS YOU KNOW WHAT YOU ARE DOING
    // DON'T TOUCH THIS - YOU HAVE BEEN WARNED!!!
    // Open a file and write out object
      * @param fullPathOfFile
      * @exception IOException
     public void writeToFile(String fullPathOfFile)throws IOException
        // Lets get a handle on the file to write to
        File myFile = new File (fullPathOfFile);
        ObjectOutputStream myStream = new ObjectOutputStream(
                                        new BufferedOutputStream(
                                        new FileOutputStream(myFile)));
        System.out.println("Writing to the file now....");
        myStream.writeObject(this);              // Write the object to file
        myStream.close();                             // Don't forget this!!
      * Open the file and read in object
     * DON'T TOUCH THIS - YOU HAVE BEEN WARNED!!!
     * This needs to be static - an object cannot read in itself
      * @return Shop
      * @param fullPathOfFile
      * @exception IOException
     public static Shop readFromFile(String fullPathOfFile)throws IOException
        // This will hold our new object
        Shop theShopContents;
        // Lets get a handle on the file to read in
        File myFile = new File (fullPathOfFile);
        if ((!myFile.isFile()) || (!myFile.canRead()))
            // Let's leave
            throw new IOException("Path is not valid ....");
        ObjectInputStream myStream =
            new ObjectInputStream(
                new BufferedInputStream(
                new FileInputStream(myFile)));
        System.out.println("Reading from the file now....");
        // Read the object from file - it needs to be cast
        try
            theShopContents = (Shop) myStream.readObject();
        catch(ClassNotFoundException e)
            throw new IOException("Objects of incorrect class");
        catch(InvalidClassException e)
            throw new IOException("Class definition changed");
        myStream.close();
        return theShopContents;
      * @param args
     public static void main(String[] args) {
         // Don't touch any of this code
         Shop betsy;
         try {
              betsy = Shop.readFromFile("./Betsy.data");
              betsy.buf = new BufferedReader (new InputStreamReader(System.in));
         catch (Exception e) {
             // Something went wrong so start a new shop
             betsy = new Shop();
         betsy.runMenu();
         try {
             betsy.writeToFile("./Betsy.data");
         catch (Exception e) {
             System.out.println("Sorry but we just lost everything");
      * Creates a new item, and adds it to the shelves
     private void createItem() {
            try{
             // Ask the user for the name of the new item
          System.out.print("Please enter the name of the item to be created: ");
          // Create the new item with the name the user has given
          Item tempItem = new Item(buf.readLine());
          // Add the item to the shelves
          theShelves.addItem(tempItem);
          // Call the setItemPrice function
          setItemPrice(tempItem);
          // Call the setItemStockLevel function
          setItemStockLevel(tempItem);
         catch (ShelfExceptionFull e){
             // Print an error message to handle the ShelfExceptionFull
          // (No more room on the shelves to add new item)
              System.out.println("\nThere is no more room to add an item to the shelves "+e);
              // Return to the root menu
                  return;
         catch (IOException e){
             // Print an error message to handle the IO Exception
          // (Error in receiving user input)
              System.out.println("\nThe till has suffered an IO exception "+e);
      * Changes the price of an item using the passed item object
      * @param tempItem
     private void setItemPrice(Item tempItem){
         boolean done = false;
             while( done != true ){
                 try{
                  // Ask for the input of the item price
               System.out.print("Please Enter the price of the item: $");
                  // Set the item price
                  tempItem.setItemPrice(Integer.parseInt (buf.readLine()));
               // Set the loop to finish
               done = true;
              catch (IOException e){
                   System.out.println("\nThe till has suffered an IO exception "+e);
              catch(NumberFormatException e){
                   System.out.println("\nPlease enter a number only");
      * Sets the stock level of an item using the passed item number to locate the object
      * @param itemNumber
     private void setItemStockLevel(int itemNumber){
          Item tempItem = theShelves.getItemByPosition( itemNumber );
          // Create 'done' to hold the condition of the following while loop
          boolean done = false;
              while(done != true){
                  try{
                    // Ask for the input of the item stock level
                 System.out.print("Please Enter the stock level of the item: ");
                 // Set the item stock level
                 tempItem.setQuantity( Integer.parseInt( buf.readLine() ) );
                 // Set the loop to finish
                 done = true;
               catch (IOException e){
                   // Print an error message to handle the IO Exception
                // (Error in receiving user input)
                    System.out.println("\nThe till has suffered an IO exception "+e);
               catch(NumberFormatException e){
                       // Print an error message to handle the NumberformatException
                    // (User has entered a none int value)
                    System.out.println("\nPlease enter a number only");
      * Sets the stock level of an item using the passed item object
      * @param tempItem
     private void setItemStockLevel(Item tempItem) {
         // Create 'done' to hold the condition of the following while loop
         boolean done = false;
             while(done != true){
              try{
                  // Ask for the input of the item stock level
               System.out.print("Please Enter the stock level of the item: ");
                  // Set the item stock level
               tempItem.setQuantity( Integer.parseInt( buf.readLine() ) );
               // Set the loop to finnish
               done = true;
              catch (IOException e){
                  // Print an error message to handle the IO Exception
               // (Error in receiving user input)
                   System.out.println("\nThe till has suffered an IO exception "+e);
              catch( NumberFormatException e ){
                   // Print an error message to handle the NumberformatException
                   // (User has entered a none int value)
                   System.out.println("\nPlease enter a number only");
      * Decrements the stock level of a passed item object
      * @param tempItem
     private void DecItemStockLevel(Item tempItem){
         // Get the current item stock level and store locally
         int tempQuantity = tempItem.getQuantity();
         // Set the new item stock level to the current level - 1
         tempItem.setQuantity( --tempQuantity );
      * null
     private void createMoney(){
       Monies tempMonies = new Monies();
         System.out.print("\nPlease enter the name of the coin/cash type you wish to create: ");
                tempMonies.setCoinName(buf.readLine());
         System.out.print("\nPlease enter the numerical value of the new money type: ");
                tempMonies.setValue(Integer.parseInt(buf.readLine()));
        private void setMoney(int quantity){
            Monies tempMonies = theTill.getMoniesByPosition(quantity);
            boolean done = false;
                while(done != true){
                    try{
                        // Ask for the input of the till money
                        System.out.prinln("Please enter the amount of money in the till ");
                        // Set the till money
                        tempMonies.setQuantity(Integer.parseInt(buf.readLine()));
                        // Set the loop to finish
                        done = true;
                    catch (IOException e){
                   // Print an error message to handle the IO Exception
                // (Error in receiving user input)
                    System.out.println("\nThe till has suffered an IO exception "+e);
              catch(NumberFormatException e){
                       // Print an error message to handle the NumberformatException
                    // (User has entered a none int value)
                    System.out.println("\nPlease enter a number only");
      * Prints a list of items from an ArrayList in receipt format
      * (List must only contain type 'Item')
      * @return int
      * @param tempItems
     private int printItemReceipt(ArrayList tempItems) {
         // Clone the tempItems list so that it can be picked apart
         ArrayList tempReceipt = (ArrayList)tempItems.clone();
          * Print a list of the items in a receipt format (to be sold)
          * This is done by searching through the list, when an object
          * is found, a search for other objects of the same type is
          * run, when one is found, the ammount of the object is increased
          * then the instance is removed from the list until there are no more
         // Hold the total item cost tally
         int total = 0;
             for(int i = 0; i < tempReceipt.size(); i++){
              Item tempItem = (Item)tempReceipt.get( i );
              int tempItemAmount = 0;
                  while(tempReceipt.contains(tempItem)){
                   tempItemAmount++;
                   tempReceipt.remove( tempItem );
               System.out.println( "\n" + tempItemAmount + " x " + tempItem.getItemName() );
               System.out.print("                  $" + tempItem.getItemPrice() + "(x" + tempItemAmount + ")");
               System.out.print("   $" + (tempItemAmount * (tempItem.getItemPrice())) );
               total += tempItemAmount * (tempItem.getItemPrice());
          System.out.println("\n\nItem total = $" + total);
          System.out.println();
          return total;
      * null
      * @param tempItems
     private void checkout(ArrayList tempItems){