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Thread: buggy class

  1. #1
    Junior Member
    Join Date
    Apr 2010
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    Default buggy class

    hello everybody i'm having a headache with this buggy code


    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    public class JPizza extends JFrame implements ItemListener
    {
    	final int SMALL = 7, MEDIUM = 9, LARGE = 11, X_LARGE = 14;
    	//final int[] sizesPrices = {7,9,11,14};
    	final int TOOPING_PRICE = 1;
    	int totalPrice = SMALL;
     
    	JCheckBox cheeseBox = new JCheckBox("Cheese", true);
    	JCheckBox PepperoniBox = new JCheckBox("Pepperoni", false);
    	JCheckBox BlackOlivesBox = new JCheckBox("Black Olives", false);
    	JCheckBox MushroomsBox = new JCheckBox("Mushrooms", false);
    	JCheckBox PineappleBox = new JCheckBox("Pineapple", false);
    	JCheckBox HamBox = new JCheckBox("Ham", false);
     
     
    	JLabel sizelbl = new JLabel("Select the size for your pizza");
    	String[] size = { "Small $" + SMALL , "Medium $" + MEDIUM,
    							"Large $" + LARGE, "X Large $" + X_LARGE };
    	JComboBox sizeBox = new JComboBox(size);
     
    	JTextField totPriceTxt = new JTextField(10);
    	JLabel optionExplainLabel = new JLabel("The price For each topping is $" +TOOPING_PRICE);
    	JLabel optionExplainLabel2 = new JLabel("Theres no charge for cheese");
     
    	JLabel selectTopinglbl = new JLabel("please select your toppings");
    	JLabel ePrice = new JLabel("The price for you pizza is");
     
    	Container con;
    	JPanel panel = new JPanel();
    	//this is the contructor that builds the frame
    	public JPizza()
    	{
    		super("PIZZA MAKER");
    		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		con = getContentPane();
    		con.add(panel);
    		panel.add(sizelbl);
    		panel.add(sizeBox);
    		panel.add(optionExplainLabel);
    		panel.add(optionExplainLabel2);
    		panel.add(selectTopinglbl);
    		panel.add(cheeseBox);
    		panel.add(PepperoniBox);
    		panel.add(BlackOlivesBox);
    		panel.add(MushroomsBox);
    		panel.add(PineappleBox);
    		panel.add(HamBox);
    		panel.add(ePrice);
    		panel.add(totPriceTxt);
    		totPriceTxt.setText("$" + totalPrice);
    		sizeBox.addItemListener(this);
    		PepperoniBox.addItemListener(this);
    		BlackOlivesBox.addItemListener(this);
    		MushroomsBox.addItemListener(this);
    		PineappleBox.addItemListener(this);
    		HamBox.addItemListener(this);
    	}
    	// this make the frame
    	public static void main(String[] args)
    	{
    		final int WIDHT = 280;
    		final int HEIGTH = 250;
    		JPizza aFrame = new JPizza();
    		aFrame.setSize(WIDHT,HEIGTH);
    		aFrame.setVisible(true);
    	}
    	//this will listen to everything
    	public void itemStateChanged(ItemEvent event)
    	{
    		Object source = event.getSource();
    		int select = event.getStateChange();
    		// this code listen to the comboBox
    		if(source == sizeBox)
    		{
    			int sizePrice;
    			if ((sizeBox.getSelectedIndex()) == 0)
    				 sizePrice = 7;
    			else if((sizeBox.getSelectedIndex()) == 1)
    				sizePrice = 9;
    			else if((sizeBox.getSelectedIndex()) == 2)
    				sizePrice = 11;
    			else //if((sizeBox.getSelectedIndex()) == 3)
    				sizePrice = 14;
    			totalPrice = sizePrice;
    		}
     
    		//this will listen to the checkboxes
    		else if (source == PepperoniBox)
    		{
    			if (select == ItemEvent.SELECTED)
    				totalPrice += TOOPING_PRICE;
    			else
    				totalPrice -=TOOPING_PRICE;
    		}
    		else if (source == BlackOlivesBox)
    		{
    			if (select == ItemEvent.SELECTED)
    				totalPrice += TOOPING_PRICE;
    			else
    				totalPrice -=TOOPING_PRICE;
    		}
    		else if (source == MushroomsBox)
    		{
    			if (select == ItemEvent.SELECTED)
    				totalPrice += TOOPING_PRICE;
    			else
    				totalPrice -=TOOPING_PRICE;
    		}
    		else if (source == PineappleBox)
    		{
    			if (select == ItemEvent.SELECTED)
    				totalPrice += TOOPING_PRICE;
    			else
    				totalPrice -=TOOPING_PRICE;
    		}
    		else //(source == HamBox)
    		{
    			if (select == ItemEvent.SELECTED)
    				totalPrice += TOOPING_PRICE;
    			else
    				totalPrice -=TOOPING_PRICE;
    		}
    		//this updates the final price
    		totPriceTxt.setText("$" + totalPrice);
    	}
    }
    every thing its working the way i want,
    but if i select a checkbox first and then i select a from the combobox
    it wont give me the correct result ...

    e.g.
    if i select "small $7" total is 7
    then i select "pepperoni" total its fine "8",
    now if i change "small $7" to "large $9" i would expect the total be "10" having the "pepperoni" selected,
    but it is not the total is "9"

    how can i solve this bug any suggestion?
    thanks in advance


  2. #2
    Junior Member
    Join Date
    Apr 2010
    Location
    Italy
    Posts
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    Thanked 3 Times in 3 Posts

    Default Re: buggy class

    Hi,
    this is the problem:
    when you change "small $7" to "large $9", the event, that is fired, is on the size
    select. And the totalprice is set to sizePrice (=> $9).
    Others if (source == PepperoniBox) or if (source == BlackOlivesBox) etc
    are not fired so $1 for pepperoni is not added and the totalprice remains $9 .

    Why in your code, you remove TOOPING_PRICE if
    unselect an ingredient and if you change the pizza's size
    you don't remove the different of price?

    Bye

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