Errors in GUI program

[Candie Duggan]

I have a program for class that has 6 parts to it. I got all of them working except the GUI part. I keep getting two errors that repeat in the code. Could someone please explain what these errors mean and how can I fix them? Here is my code:

  //Inventory Program Part6
//Candie Duggan
//March 30, 2009

import java.text.*;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

import java.net.URL;

//Driver program to demonstrate the use of the CD class to store and display Music CD inventory.

public class GUI extends JFrame {

	MusicCDInventory theMusicCDInventory;
	
	//Location of the inventory on the screen.
	int index = 0;

	//Create a number formatter that turns doubles into strings that look like prices.
	NumberFormat moneyFormat = NumberFormat.getCurrencyInstance();

	//GUI elements to display currently selected Music CD information.
	private JLabel uPCNumberLabel;
	private JTextField uPCNumberText;
	
	private JLabel cDNameLabel;
	private JTextField cDNameText;
	
	private JLabel genreLabel;
	private JTextField genreText;
	
	private JLabel quantityOnHandLabel;
	private JTextField quantityOnHandText;
	
	private JLabel unitPriceLabel;
	private JTextField unitPriceText;
	
	private JLabel restockingFeeLabel;
	private JTextField restockingFeeText;
	
	private JLabel valueLabel;
	private JTextField valueText;
	
	private JLabel entireMusicCDInventoryValueLabel;
	private JLabel entireMusicCDInventoryValueText;

	//Load the logo into a component for the GUI.
	private JLabel logoLabel;
	
	//Panel to hold buttons.
	private JPanel buttonPanel; 

	//Setup buttons.
	//Button to display next inventory item.
	JButton nextButton;
	JButton previousButton;
	JButton firstButton;
	JButton lastButton;

	//Button to manipulate the inventory
	JButton addButton;
	JButton deleteButton;
	JButton modifyButton;
	JButton searchButton;
	JButton saveButton;

	//Setup the GUI with a given inventory object.
	public GUI(MusicCDInventory t)
	{
	
		//Track the inventory.
		theMusicCDInventory = t;
		
		//Setup the element of the GUI.
		uPCNumberLabel = new JLabel("UPC Number: ");
		cDNameLabel = new JLabel("CD Name: ");
		genreLabel = new JLabel("Genre: ");
		quantityOnHandLabel = new JLabel("Quantity On Hand: ");
		unitPriceLabel = new JLabel("Unit Price: ");
		restockingFeeLabel = new JLabel("Restocking Fee: ");
		valueLabel = new JLabel("Inventory Value: ");
		entireMusicCDInventoryValueLabel  = new JLabel("Value of Entire Music CD Inventory:");
		logoLabel = new JLabel();

		uPCNumberText = new JTextField("");
		cDNameText = new JTextField("");
		genreText = new JTextField("");
		quantityOnHandText = new JTextField("");
		unitPriceText = new JTextField("");
		restockingFeeText = new JTextField("");
		valueText = new JTextField("");
		entireMusicCDInventoryValueText = new JLabel("");

		uPCNumberText.setEditable(false);
		cDNameText.setEditable(false);
		genreText.setEditable(false);
		quantityOnHandText.setEditable(false);
		unitPriceText.setEditable(false);
		restockingFeeText.setEditable(false);
		valueText.setEditable(false);
		

		//Set the code for the buttons.
		nextButton = new JButton("Next"); 
		nextButton.addActionListener(new ActionListener() //Register event handler 
		{ 
			public void actionPerformed(ActionEvent event) //Process button event 
			{  	
				//When going to the previous item, move forward one.
				index++;
				//If at the end (ie. index = theMusicCDInventory.getNumberOfMusicCDs() - 1), then index will be theMusicCDInventory.getNumberOfMusicCDs() now
				if ( index == theMusicCDInventory.getNumberOfMusicCDs() ) {
					//The index can not exceed the size of our inventory array, so move to the front of the inventory.
					//Index is
					index = 0;
				}
				repaint();				
			}
		});
		
		previousButton = new JButton("Previous"); 
		previousButton.addActionListener(new ActionListener() //Register event handler 
		{ 
			public void actionPerformed(ActionEvent event) //Process button event 
			{  	
				//When going to the previous item, move back one
				index--;
				//If at the beginning (ie. index = 0), then index will be -1.
				if ( index == -1 ) {
					//Index can not be == -1, so move to the end of the inventory.
					//Index is
					index = theMusicCDInventory.getNumberOfMusicCDs() - 1;
				}
				repaint();
			}
		});
		
		firstButton = new JButton("First"); 
		firstButton.addActionListener(new ActionListener() //Register event handler 
		{ 
			public void actionPerformed(ActionEvent event) //Process button event 
			{  	
				//First element of the inventory is at
				index = 0;
				
				repaint();				
			}
		});
		
		lastButton = new JButton("Last"); 
		lastButton.addActionListener(new ActionListener() //Register event handler 
		{ 
			public void actionPerformed(ActionEvent event) //Process button event 
			{  	
				//Last element of the inventory is at
				index = theMusicCDInventory.getNumberOfMusicCDs() - 1;

				repaint();				
			}
		});

		//Search for a CD in the inventory
		Action searchAction = new AbstractAction("Search") {
			public void actionPerformed(ActionEvent evt) { 
				//First time the search button is pressed, 
				if (searchButton.getText().equals("Search")) {
					
					//Change the text
					searchButton.setText("GO!");
					
					//Title of the current CD becomes editable
					cDNameText.setEditable(true);
					
				//Second time it is pressed,
				} else if (searchButton.getText().equals("GO!")) {
					
					//Name of the current CD becomes non-editable again
					cDNameText.setEditable(false);
					
					String inputcDName = cDNameText.getText();
					
					//Reach the end of the list looking for CD,
					int i = theMusicCDInventory.searchBycDName(inputcDName);
					if ( i >= 0 ) {
						index = i;
						repaint();
					} else {
						//Display a dialog box stating the CD was not found.
						JOptionPane.showMessageDialog(null, "CD matching title \""+ inputcDName +"\" not found");
					}
					
					searchButton.setText("Search");
				}
				
				repaint();
			}
		};
		searchButton = new JButton(searchAction);

		//Save the inventory to the file.
		Action saveAction = new AbstractAction("Save") {
			public void actionPerformed(ActionEvent evt) { 
				theMusicCDInventory.saveToFile("C:\\data", "MusicCDinventory.dat");
			}
		};
		saveButton = new JButton(saveAction);

		Action deleteAction = new AbstractAction("Delete") {
			public void actionPerformed(ActionEvent evt) { 
				//Remove the CD from the current location.
				theMusicCDInventory = theMusicCDInventory.deleteMusicCD(index);
				//Move back to the previous CD, but don't go to the end.
				index--;
				if (index < 0) index = 0;
				
				repaint();
			}
		};
		deleteButton = new JButton(deleteAction);

		Action modifyAction = new AbstractAction("Modify") {
			public void actionPerformed(ActionEvent evt) { 
				//First time the Modify button is pressed.
				if (modifyButton.getText().equals("Modify")) {
					modifyButton.setText("Click to Modify");

					//Make sure only button to press is the Modify button.
					disableButtons();
					//Modify the text of the button so the user knows to click again when done entering new information.
					modifyButton.setEnabled(true);

					//Enable only those fields that will create a new CD object.
					disableFields();
					enableFieldsForModifying();
					
				} else {
					//Second time the button has been pressed change the text back from "Click to Modify" to simply "Modify".
					modifyButton.setText("Modify");

					//Create a new CD from what the user entered.
					CD newMusicCD = getMusicCDFromGUI();
					
					//Replace the old CD in the Inventory with the new CD.
					theMusicCDInventory.setMusicCD(index, newMusicCD);

					//Update the GUI to show the new information.
					repaint();
					
					//Re-enable all the buttons in the GUI.
					enableButtons();
					//Re-disable editing the informaiton in the GUI.
					disableFields();
				}
			}
		};
		modifyButton = new JButton(modifyAction);

			
		Action addAction = new AbstractAction("Add") {
			public void actionPerformed(ActionEvent evt) { 
				//First time the add button has been pressed.
				if (addButton.getText().equals("Add")) {
					//Make sure only button to press is the add button.
					disableButtons();
					addButton.setEnabled(true);
					//Change the text of the button so the user knows to click again when done entering new information.
					addButton.setText("Click to Add");
					
					//Clear the GUI fields with default values and enable only those that will create a new CD.
					prepFieldsForAdding();
					
				} else {
					//Second time the button has been pressed change the text back from "Click to Add" to simply "Add".
					addButton.setText("Add");
					
					//Create a new CD from information the user entered.
					CD newMusicCD = getMusicCDFromGUI();

					//Add it to the inventory.
					addMusicCDToMusicCDInventory(newMusicCD);
					
					//Sort the inventory with the new CD added.
					theMusicCDInventory.sortMusicCDInventory();
					
					//Move to the CD's new location
					index = theMusicCDInventory.searchByMusicCD(newMusicCD);

					//Update the GUI to reflect the new information.
					repaint();
					
					//Re-enable all the buttons in the GUI.
					enableButtons();
					//Re-disable editing the informaiton in the GUI.
					disableFields();
				}
			}
		};
		addButton = new JButton(addAction);


		//Window title.
		this.setTitle("Music CD Inventory - 6");

		//Exit the program when the window is closed.
 		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		//Create and setup panel to hold buttons.
		buttonPanel = new JPanel();
		buttonPanel.add(nextButton);
		buttonPanel.add(previousButton);
		buttonPanel.add(firstButton);
		buttonPanel.add(lastButton);
		buttonPanel.add(addButton);
		buttonPanel.add(deleteButton);
		buttonPanel.add(searchButton);
		buttonPanel.add(saveButton);
		//Add the panel to the top of the GUI's window.
		this.getContentPane().add(buttonPanel, BorderLayout.NORTH);

		//Setup a panel to collect all the components.
		//This will have 8 rows and 2 columns.
		JPanel centerPanel = new JPanel(new GridLayout(8, 2, 0, 4));
		//Row 1
		centerPanel.add(uPCNumberLabel);
		centerPanel.add(uPCNumberText);

		//Row 2
		centerPanel.add(cDNameLabel);
		centerPanel.add(cDNameText);

		//Row 3
		centerPanel.add(genreLabel);
		centerPanel.add(genreText);

		//Row 4
		centerPanel.add(quantityOnHandLabel);
		centerPanel.add(quantityOnHandText);

		//Row 5
		centerPanel.add(unitPriceLabel);
		centerPanel.add(unitPriceText);

		//Row 6
		centerPanel.add(restockingFeeLabel);
		centerPanel.add(restockingFeeText);

		//Row 7
		centerPanel.add(valueLabel);
		centerPanel.add(valueText);
		
		//Add the panel to the center of the GUI's window.
		this.getContentPane().add(centerPanel, BorderLayout.CENTER);

		//Setup a panel to hold the information about the entire Music CD inventory's value
		JPanel entireMusicCDInventoryValuePanel = new JPanel();
		entireMusicCDInventoryValuePanel.add(entireMusicCDInventoryValueLabel);
		entireMusicCDInventoryValuePanel.add(entireMusicCDInventoryValueText);

		//Add this panel to the bottom of the GUI's window.
		this.getContentPane().add(entireMusicCDInventoryValuePanel, BorderLayout.SOUTH);
		
		//Load the logo.jpg image from the disk
		try {
			logoLabel = new JLabel();
			logoLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("logo.jpg")));
			this.getContentPane().add(logoLabel, BorderLayout.EAST);
		} catch (Exception e) {
			//Display an error message.
			JOptionPane.showMessageDialog (null,
				"Problem loading image logo.jpg",
				"Music CD Inventory GUI",
				JOptionPane.ERROR_MESSAGE);
		}
		
		//Sort the Music CDs by CD Name.
		theMusicCDInventory.sortMusicCDInventory();
		//Display the GUI.
		this.pack();
		this.setVisible(true);
		repaint();
	}

	// Enable all the GUI buttons.

	private void enableButtons() {
		addButton.setEnabled(true);
		deleteButton.setEnabled(true);
		firstButton.setEnabled(true);
		lastButton.setEnabled(true);
		modifyButton.setEnabled(true);
		nextButton.setEnabled(true);
		previousButton.setEnabled(true);
		saveButton.setEnabled(true);
		searchButton.setEnabled(true);
	}
	
	//Disable all the GUI buttons.

	private void disableButtons() {
		addButton.setEnabled(false);
		deleteButton.setEnabled(false);
		firstButton.setEnabled(false);
		lastButton.setEnabled(false);
		modifyButton.setEnabled(false);
		nextButton.setEnabled(false);
		previousButton.setEnabled(false);
		saveButton.setEnabled(false);
		searchButton.setEnabled(false);
	}
    
    //Disable all the fields in the GUI from being edited.
   
    private void disableFields() {
        uPCNumberText.setEditable(false);
        cDNameText.setEditable(false);
        genreText.setEditable(false);
        unitPriceText.setEditable(false);
        quantityOnHandText.setEditable(false);
    }

    
    //Clear the text fields in the GUI with default values
   
    private void clearFields() {
        entireMusicCDInventoryValueText.setText("0");
        valueText.setText("0");
        restockingFeeText.setText("0");

        uPCNumberText.setText("0");
        cDNameText.setText("");
        genreText.setText("");
        unitPriceText.setText("0.00");
        quantityOnHandText.setText("0");
    }

    
    //Enable fields in the GUI that user may enter new information in.
     
    private void enableFieldsForModifying() {
        uPCNumberText.setEditable(true);
        cDNameText.setEditable(true);
        unitPriceText.setEditable(true);
        genreText.setEditable(true);
        quantityOnHandText.setEditable(true);
    }

	public void prepFieldsForAdding() {
		clearFields();
		disableFields();
		enableFieldsForModifying();
		uPCNumberText.setText(theMusicCDInventory.getNextuPCNumber() + "");
	}

    
    //Return a Music CD from the information currently displayed in the GUI.
    
    private CD getMusicCDFromGUI() {
        //Assign the text fields to variables.
        String struPCNumber = uPCNumberText.getText().trim();
        String cDName = cDNameText.getText().trim();
        String genre = genreText.getText().trim();
        String strUnits = quantityOnHandText.getText().trim();
        String strunitPrice = unitPriceText.getText().trim();

        //Convert text into int and double.
        int units = Integer.parseInt( strUnits );
        strunitPrice = strunitPrice.replaceAll("\\$", "");
        Double unitPrice = Double.parseDouble( strunitPrice );

        return new MusicCD(cDName, struPCNumber, genre, units, unitPrice);
    }

	
	//Add the product to the underlying inventory.
	public void addMusicCDToMusicCDInventory(CD temp)
	{
		theMusicCDInventory.addMusicCD(temp);
		repaint();
	} 
	
	//Sort the items in the underlying inventory.
	public void sortMusicCDInventory()
	{
		theMusicCDInventory.sortMusicCDInventory();
		repaint();
	}

	//When the program data is modified, called repaint() to display the most recent information on the screen.
	public  void repaint() {

		//Display the current item in the screen's text area.	
		//Print out the information to the screen.
		if ( !theMusicCDInventory.isEmpty() ) {

			//Get the Music CD at the current index.
			CD theMusicCD = theMusicCDInventory.getMusicCD(index);

			uPCNumberText.setText( ""+theMusicCD.getuPCNumber() );
			
			cDNameText.setText( theMusicCD.getcDName() );

			genreText.setText( theMusicCD.getGenre() );

			unitPriceText.setText( moneyFormat.format(theMusicCD.getunitPrice()) );

			restockingFeeText.setText( moneyFormat.format(theMusicCD.restockingFee()) );

			quantityOnHandText.setText( ""+theMusicCD.getquantityOnHand() );
			
			valueText.setText( moneyFormat.format(theMusicCD.getentireMusicCDInventoryValue()) );
			
		} else {
				
				clearFields();
				uPCNumberText.setText("INVENTORY EMPTY");
		}
		
		entireMusicCDInventoryValueText.setText( moneyFormat.format(theMusicCDInventory.getentireMusicCDInventoryValue()) );

	}

}
  

The errors on lines 247, 289, and 480 are: setMusicCD(int, MusicCD) in MusicCDInventory can not be applied to (int,CD)
The errors on lines473 and 499 are: incompatible types found : MusicCD location CD return new MusicCD(cDName, struPCNumber, genre, units, unitPrice);

Thank you in advance for any help you can give me.

[David Newton]

That's a mighty long method.

247/etc. is a class cast problem: I'd guess (and w/o the rest it's just a guess) that the MusicCDInventory is expecting only MusicCD parameters, whereas you're trying to pass it a CD.

[Candie Duggan]

David,
Thank you!