public void showNote(int noteNumber)
{
Note variable = notes.get(noteNumber);
if(noteNumber < 0) {
// This is not a valid note number, so do nothing.
}
else if(noteNumber < numberOfNotes()) {
// This is a valid note number, so we can print it.
System.out.println(notes.get(noteNumber));
System.out.println(notes.getTitle());
System.out.println(notes.getMessage());
}
else {
// This is not a valid note number, so do nothing.
}
}