this.setLayout(new BorderLayout());
Panel north = new Panel();
north.add(new Label("Type a non-negative integer"));
north.add(inputArea);
north.add(calculate);
this.add(resultArea, BorderLayout.CENTER);
this.add(north, BorderLayout.NORTH);
Calculator c = new Calculator();
inputArea.addActionListener(c);
calculate.addActionListener(c);
resultArea.setEditable(false);
server = "rmi://" + this.getCodeBase().getHost() + "/fibonacci";