Copiar fichero de una carpeta a otra con interfaces en Java

Sencillo ejemplo resuelto de cÃ³mo copiar un fichero de una carpeta a otra utilizando interfaz grÃ¡fica en Java.
El cÃ³digo estÃ¡ comentado en inglÃ©s, ya que en clase muchas veces alterno inglÃ©s con castellano para ir variando el idioma de los ejercicios asÃ fuerzo a aprender inglÃ©s a la vez que estoy programando.
Puedes ver mÃ¡s abajo las tres clases que se utilizan para realizar el proceso del copiado del fichero. Las tres son necesarias para que el programa funcione correctamente.
Puedes descargar el cÃ³digo fuente en el siguiente enlace: DESCARGAR CÃ“DIGO

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;

/**
 * Class to manage the files from the program.
 * @author duhnn
 */

public class ManageFiles {
	
	/*
	 * Method to copy line by line the source file to the destination file
	 */
	
	public static boolean copyFile(File source, File destination){
		
		try{
		// Declares new buffer to read line by line
		BufferedReader bufferR = new BufferedReader(
				new FileReader(source));
		// Declares new fileWriter to write the content of the
		// file
		FileWriter writer = new FileWriter(destination
				.getAbsoluteFile());
		// Uses bufferedWriter to allow string buffer and copy
		BufferedWriter bufferW = new BufferedWriter(writer);
		
		String linea;
			// While there are lines in the source file, it writes
			// them to the destination file
		while ((linea = bufferR.readLine()) != null) {
			bufferW.write(linea);
			bufferW.write(System.getProperty("line.separator"));
			// adds line separator
		}

// Close buffers to liberate memory
		bufferR.close();
		bufferW.close();

return true;
		
		}
		catch(Exception e){
			return false;
		}
	}

}

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.font.LineBreakMeasurer;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

/**
 * Interface class named Principal, where the options of the program are shown
 * @author duhnn
 *
 */
public class Principal extends JFrame implements ActionListener {

private JPanel contentPane;
	private JFileChooser fileChooser;
	private File fileToCopy, destinationFile;
	//Boolean to check if source and destination file have been choosed.
	private boolean fileToCopySelected = false,
			destinationFileSelected = false;

/**
	 * Contructor of the Principal class
	 */
	public Principal() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		//Set bounds of frame
		setBounds(100, 100, 380, 180);
		contentPane = new JPanel();
		//Create empty border and set it on contentPane
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		contentPane.setLayout(new BorderLayout(0, 0));
		setContentPane(contentPane);

JPanel panel = new JPanel();
		contentPane.add(panel, BorderLayout.CENTER);
		panel.setLayout(null);
		
		//Set the position null, to show the panel centered on window.
		setLocationRelativeTo(null);

//Button to manage the file source
		JButton btnFitxerOrgen = new JButton("Select file");
		btnFitxerOrgen.setBounds(22, 23, 117, 25);
		// Adds listener to the button, to manage events
		btnFitxerOrgen.addActionListener(new ActionListener() {

@Override
			public void actionPerformed(ActionEvent arg0) {
				// Opens a JFileChooser when button clicked
				fileChooser = new JFileChooser();
				fileChooser
						.setDialogTitle("Choose a directory to copy the file");
				int returnVal = fileChooser.showOpenDialog(Principal.this);
				// If a file has been choosed, it's stored in a File variable
				if (returnVal == JFileChooser.APPROVE_OPTION) {
					fileToCopy = fileChooser.getSelectedFile();
					// set the boolean fileToCopySelected to know that there is
					// a selected file
					fileToCopySelected = true;
				}

}

});
		panel.add(btnFitxerOrgen);

//Button to manage the destination file
		JButton btnFitxerDest = new JButton("Destination file");
		btnFitxerDest.setBounds(151, 23, 185, 25);
		btnFitxerDest.addActionListener(new ActionListener() {

@Override
			public void actionPerformed(ActionEvent arg0) {
				// Opens a JFileChooser when button clicked
				fileChooser = new JFileChooser();
				fileChooser.setDialogTitle("Choose destination file");
				int returnVal = fileChooser.showOpenDialog(Principal.this);
				// If a file has been choosed, it's stored in a File variable
				if (returnVal == JFileChooser.APPROVE_OPTION) {
					destinationFile = fileChooser.getSelectedFile();
					// set destinationFolderSelected as true, to permit the
					// program to copy of the file
					destinationFileSelected = true;
				}

}
		});
		panel.add(btnFitxerDest);

//Button to copy source file to destination file
		JButton btnCopiar = new JButton("Copy file");
		btnCopiar.setBounds(207, 88, 117, 25);
		// Add event listener to the copy button
		btnCopiar.addActionListener(new ActionListener() {

@Override
			public void actionPerformed(ActionEvent arg0) {
				// Check if file has been choosed, and destination folder is
				// selected.
				if (destinationFileSelected && fileToCopySelected) {
					
					//Boolean to check if file has been copied.
					boolean isFileCopied = false;
						
					try{
						
						if(destinationFile.exists()){
							//If file exists, it ask the client to choose between overwrite or exit
							int selectedOption = JOptionPane.showConfirmDialog(
									null, "File exists, do you want to overwrite?",
									"Choose selection", JOptionPane.YES_NO_OPTION);
							if (selectedOption == JOptionPane.YES_OPTION) {
								//Calls method copyFile from ManageFiles class if option YES is selected
								isFileCopied = ManageFiles.copyFile(fileToCopy, destinationFile);								
							}
						}else{
							//Calls method copyFile from ManageFiles class if file doesn't exists
							isFileCopied = ManageFiles.copyFile(fileToCopy, destinationFile);
							
						}
						
						//Show message depending on the result of copyFile method 
					if(isFileCopied){
						JOptionPane.showMessageDialog(getContentPane(), "File "
								+ fileToCopy.getName() + " copied succesfully.");
					}else{
						JOptionPane.showMessageDialog(getContentPane(), "Error copying file");
					}
					
						
					}catch(Exception e){
						//Show the error to user
						JOptionPane.showMessageDialog(getContentPane(),"Error! "+e);	
					}

} else {
					// Error messages if there aren't files selected
					if (!destinationFileSelected && !fileToCopySelected) {
						JOptionPane
								.showMessageDialog(getContentPane(),
										"You must select a source file and a destination file");
					} else if (!destinationFileSelected) {
						JOptionPane.showMessageDialog(getContentPane(),
								"You must select a destination file.");
					} else if (!fileToCopySelected) {
						JOptionPane.showMessageDialog(getContentPane(),
								"You must select a file to copy.");

}
				}

}
		});
		panel.add(btnCopiar);
	}

@Override
	public void actionPerformed(ActionEvent arg0) {

}
}

ProgramaciÃ³n

Mysql

Terminal ubuntu