Thread: Syntax error with dispose()

Hello, I have been having a problem in some code I'm writing.

I'm doing a project in 8th grade that involves some GUI and I have a problem with my listener and this.dispose().

I'll post the code with the error here:

class doneListener implements ActionListener{
			public void actionPerformed (ActionEvent e){
				if("doneAdd".equals(e.getActionCommand())){
					addFrame.dispose();

Basically I'm getting an error on addFrame, which is the name of my JFrame variable that contains all the stuff in the window.

I'll post the whole thing here:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
 
public class primary extends JPanel
                      implements ListSelectionListener {
    private JList list;
    private DefaultListModel listModel;
 
    private static final String addString = "ADD!";
    private static final String removeString = " - ";
    private static final String editString = "edit";
    private JButton removeButton,editButton;
    private static final String doneAdd = "Done!";
 
    public primary() {
        super(new BorderLayout());
 
        listModel = new DefaultListModel();
 
        //Create the list and put it in a scroll pane.
        list = new JList(listModel);
        list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        list.setSelectedIndex(0);
        list.addListSelectionListener(this);
        list.setVisibleRowCount(20);
 
 
 
 
 
        JScrollPane listScrollPane = new JScrollPane(list);
 
        JButton addButton = new JButton(addString);
        addButton.setActionCommand(addString);
        addButton.addActionListener(new AddListener());
        addButton.setEnabled(true);
 
        editButton = new JButton(editString);
        editButton.setActionCommand(editString);
        editButton.addActionListener(new EditListener());
 
        removeButton = new JButton(removeString);
        removeButton.setActionCommand(removeString);
        removeButton.addActionListener(new RemoveListener());
 
 
        //Create a panel that uses BoxLayout.
        JPanel buttonPane = new JPanel();
        buttonPane.setLayout(new BorderLayout());
        JPanel addremovePane = new JPanel();
 
 
        addremovePane.setLayout(new BorderLayout());
        addremovePane.add(addButton, BorderLayout.LINE_START);
        addremovePane.add(removeButton, BorderLayout.LINE_END);
 
        addremovePane.add(Box.createHorizontalStrut(5), BorderLayout.CENTER);
 
        buttonPane.add(addremovePane, BorderLayout.LINE_START);
        buttonPane.add(editButton, BorderLayout.LINE_END);
 
        buttonPane.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
 
        add(listScrollPane, BorderLayout.CENTER);
        add(buttonPane, BorderLayout.PAGE_END);
 
        if (listModel.getSize()==0){
        	removeButton.setEnabled(false);
        	editButton.setEnabled(false);
        }
    }
 
    class RemoveListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            int index = list.getSelectedIndex();
            listModel.remove(index);
 
            int size = listModel.getSize();
 
            if (size == 0) { //Nobody's left, disable remove
                removeButton.setEnabled(false);
 
            } else { //Select an index.
                if (index == listModel.getSize()) {
                    //removed item in last position
                    index--;
                }
 
                list.setSelectedIndex(index);
                list.ensureIndexIsVisible(index);
            }
        }
    }
 
 
 
 
    class EditListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            int index = list.getSelectedIndex();
 
 
                list.setSelectedIndex(index);
                list.ensureIndexIsVisible(index);
            }
        }
 
 
    class addWindow extends JPanel{
 
    	public addWindow(){
    		super(new BorderLayout());
 
    		String [] eqSel = {"Test1","Test2","Test3"};
 
    		JPanel topPanel = new JPanel(new BorderLayout());
    		JPanel buttonPanel = new JPanel(new BorderLayout());
    		JPanel comboPanel = new JPanel(new BorderLayout());
 
 
    		JCheckBox solType = new JCheckBox("Equation as solution?",false);
    		solType.setEnabled(true);
    		topPanel.add(solType,BorderLayout.PAGE_END);
 
    		JButton doneButton = new JButton(doneAdd);
    		doneButton.setEnabled(true);
    		doneButton.setActionCommand(doneAdd);
    		doneButton.addActionListener(new doneListener());
 
    		JComboBox eqType = new JComboBox(eqSel);
    		eqType.setEnabled(true);
    		topPanel.add(eqType,BorderLayout.LINE_START);
    		add(topPanel,BorderLayout.PAGE_START);
 
 
            buttonPanel.setLayout(new BorderLayout());
            buttonPanel.add(doneButton, BorderLayout.PAGE_END);
            add(buttonPanel,BorderLayout.LINE_END);
    	}
		class doneListener implements ActionListener{
			public void actionPerformed (ActionEvent e){
				if("doneAdd".equals(e.getActionCommand())){
					addFrame.dispose();
				}
			}
		}
    	}
 
 
   public class AddListener implements ActionListener{
        //Required by ActionListener.
        public void actionPerformed(ActionEvent e) {
            int index = list.getSelectedIndex(); //get selected index
 
            if (index == -1) { //no selection, so insert at beginning
                index = 0;
            } else {           //add after the selected item
                index++;
            }
            JFrame addFrame = new JFrame("Equation Editor");
            //Select the new item and make it visible.
            list.setSelectedIndex(index);
            list.ensureIndexIsVisible(index); 
            //This creates the window
            //These lines create the frame
 
            addFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
 
            //Create and set up the content pane.
            JComponent newContentPane = new addWindow();
            newContentPane.setOpaque(true); //content panes must be opaque
            addFrame.setContentPane(newContentPane);
 
            //Display the window.
            addFrame.pack();
            addFrame.setSize(300,500);
            addFrame.setVisible(true);
            addFrame.setResizable(false);
        }
 
     }
 
 
    //This method is required by ListSelectionListener.
    public void valueChanged(ListSelectionEvent e) {
        if (e.getValueIsAdjusting() == false) {
 
            if (list.getSelectedIndex() == -1) {
            //No selection, disable remove and edit button
                removeButton.setEnabled(false);
                editButton.setEnabled(false);
 
            } else {
            //Selection, enable the remove and edit button
                removeButton.setEnabled(true);
                editButton.setEnabled(true);
            }
        }
    }
 
 
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("Puzzles!");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        //Create and set up the content pane.
        JComponent newContentPane = new primary();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);
 
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }
 
    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

I've tried moving around the class that it's in, nesting it within the JFrame class, making the JFrame class public, and changing around the syntax of dispose();. My teacher is out of ideas and I am stuck until I can get this solved.

Thanks!