A Code Snippet that would help
try
{
FileOutputStream out = new
FileOutputStream(System.getProperty("user.home")
+ File.separator
+ "Library"
+ File.separator
+ "Preferences"
+ File.separator
+ "preferences.dat");
ObjectOutputStream obj_out = new ObjectOutputStream(out);
obj_out.writeObject(this);
}
catch(IOException ioe)
{
JOptionPane.showMessageDialog(null,
Util.props.getPreference("Error.txtPreferencesLost"),
"Error",
JOptionPane.ERROR_MESSAGE);
}