macOS (Hopefully simple) Help in Java please!

package compression;

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.apple.eawt.Application;
import com.apple.eawt.ApplicationEvent;
import com.apple.eawt.ApplicationListener;



/*
 * Comprezzor.java uses these files:
 *   images/Open.gif
 *   images/Save.gif
 */

public class Comprezzor extends JPanel
			implements ActionListener, ApplicationListener {
	static private final String newline = "\n";
	JButton comprezzButton, decomprezzButton;
	JTextArea log;
	JFileChooser fc;
	ApplicationListener appListener;


	public Comprezzor() {
		super(new BorderLayout());

		//Create the log first, because the action listeners
		//need to refer to it.  We format the log here.
		log = new JTextArea(12,30);
		log.setLineWrap(true);
		log.setWrapStyleWord(true);
		log.setMargin(new Insets(5,5,5,5));
		log.setEditable(false);
		JScrollPane logScrollPane = new JScrollPane(log);
		logScrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		logScrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
		log.append("Welcome to Comprezzor v1.0.  This program sucks.  It might not even work anyway." + newline + newline);

		log.setCaretPosition(log.getDocument().getLength());

		//Create a file chooser
		fc = new JFileChooser();
		fc.setMultiSelectionEnabled(false);
		fc.setFileSelectionMode(JFileChooser.FILES_ONLY);



		//Create the comprezz button.
		comprezzButton = new JButton("Comprezz File...",
								 createImageIcon("images/Open.gif"));
		comprezzButton.addActionListener(this);

		//	  Create the decomprezz button.
		decomprezzButton = new JButton("Decomprezz File...",
								 createImageIcon("images/Save.gif"));
		decomprezzButton.addActionListener(this);

		//For layout purposes, put the buttons in a separate panel
		JPanel buttonPanel = new JPanel(); //use FlowLayout
		buttonPanel.add(comprezzButton);
		buttonPanel.add(decomprezzButton);

		//Add the buttons and the log to this panel.
		add(buttonPanel, BorderLayout.PAGE_START);
		add(logScrollPane, BorderLayout.CENTER);
	}
	String fileText = null;
	String filePath = null;
	String text = null;

	public void MacOSAppAdapter() {
		appListener = new MyAppEventHandler();
	}

	/** Method to register this handler with Apple's event manager, calling
	 * addApplicationListener in parent class.
	 */
	public void register() {
		addApplicationListener(appListener);
	}

	class MyAppEventHandler implements ApplicationListener {
		public void handleOpenApplication(ApplicationEvent event) {
		}

		public void handleAbout(ApplicationEvent arg0) {
			// TODO Auto-generated method stub
			
		}

		public void handleOpenFile(ApplicationEvent event) {
			try {
				File file = event.//HELP!  How do I get the file path?!
				log.append("Now decomprezzing: " + file.getName() + "." + newline);
				filePath = file.getAbsolutePath();
				log.append("Opening file..." + newline);
				fileText = Opener.readFile(filePath);
				fileText = JDecompress.decompress(fileText);
				log.append("Decomprezzing..." + newline);
				log.append("Writing file..." + newline);
				Writer.Save(file, fileText);
				file.setName(file.getName().split(".cmprzz")[0]);
				log.append("Done!" + newline + newline);
			}
			catch (Throwable t) {
				log.append("Didn't work =(" + newline + newline);
			}
			
			
		}

		public void handlePreferences(ApplicationEvent arg0) {
			// TODO Auto-generated method stub
			
		}

		public void handlePrintFile(ApplicationEvent arg0) {
			// TODO Auto-generated method stub
			
		}

		public void handleQuit(ApplicationEvent arg0) {
			// TODO Auto-generated method stub
			
		}

		public void handleReOpenApplication(ApplicationEvent arg0) {
			// TODO Auto-generated method stub
			
		}
	}


	public void actionPerformed(ActionEvent e) {
		//Handle open button action.
		if (e.getSource() == comprezzButton) {
			fc.setDialogTitle("Comprezz File");
			int returnVal = fc.showOpenDialog(Comprezzor.this);
			if (returnVal == JFileChooser.APPROVE_OPTION) {
				//This is where a real application would open the file.
				try {
					File file = fc.getSelectedFile();
					log.append("Now comprezzing: " + file.getName() + "." + newline);
					fc.setCurrentDirectory(new File("."));
					fc.showOpenDialog(null);
					filePath = file.getAbsolutePath();
					fileText = Opener.readFile(filePath);
					log.append("Done!" + newline + newline);
				}
				catch (Throwable t) {
					log.append("Didn't work =(" + newline + newline);
				}
			} else {
				log.append("Comprezz command cancelled." + newline + newline);
			}
			log.setCaretPosition(log.getDocument().getLength());


		}

		//Handle save button action.
		else if (e.getSource() == decomprezzButton) {
			fc.setDialogTitle("Decomprezz File");
			int returnVal = fc.showOpenDialog(Comprezzor.this);
			if (returnVal == JFileChooser.APPROVE_OPTION) {
				//This is where a real application would save the file.
				try {
					File file = fc.getSelectedFile();
					log.append("Now decomprezzing: " + file.getName() + "." + newline);
					fc.setCurrentDirectory(new File("."));
					filePath = file.getAbsolutePath();
					log.append("Opening file..." + newline);
					fileText = Opener.readFile(filePath);
					fileText = JDecompress.decompress(fileText);
					log.append("Decomprezzing..." + newline);
					log.append("Writing file..." + newline);
					Writer.Save(file, fileText);
					file.setName(file.getName().split(".cmprzz")[0]);
					log.append("Done!" + newline + newline);
				}
				catch (Throwable t) {
					log.append("Didn't work =(" + newline + newline);
				}
			} else {
				log.append("Decomprezz command cancelled." + newline + newline);
			}
			log.setCaretPosition(log.getDocument().getLength());
		}
	}

	/** Returns an ImageIcon, or null if the path was invalid. */
	protected static ImageIcon createImageIcon(String path) {
		java.net.URL imgURL = Comprezzor.class.getResource(path);
		if (imgURL != null) {
			return new ImageIcon(imgURL);
		} else {
			System.err.println("Couldn't find file: " + path);
			return null;
		}
	}

	/**
	 * Create the GUI and show it.  For thread safety,
	 * this method should be invoked from the
	 * event dispatch thread.
	 */
	private static void createAndShowGUI() {
		//Create and set up the window.
		JFrame frame = new JFrame("Comprezzor");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		//Add content to the window.
		frame.add(new Comprezzor());

		//Display the window.
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(final String args[]) {
		//Schedule a job for the event dispatch thread:
		//creating and showing this application's GUI.
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				//Turn off metal's use of bold fonts
				UIManager.put("swing.boldMetal", Boolean.FALSE);
				createAndShowGUI();
			}
		});
	}

	public void handleAbout(ApplicationEvent arg0) {
		// TODO Auto-generated method stub

	}

	public void handleOpenApplication(ApplicationEvent arg0) {
		// TODO Auto-generated method stub

	}

	public void handleOpenFile(ApplicationEvent arg0) {
		// TODO Auto-generated method stub

	}

	public void handlePreferences(ApplicationEvent arg0) {
		// TODO Auto-generated method stub

	}

	public void handlePrintFile(ApplicationEvent arg0) {
		// TODO Auto-generated method stub

	}

	public void handleQuit(ApplicationEvent arg0) {
		// TODO Auto-generated method stub

	}

	public void handleReOpenApplication(ApplicationEvent arg0) {
		// TODO Auto-generated method stub

	}
}