Stuff

    class KnopHandler implements ActionListener{        private Rekenmachine rekenmachine;            public void actionPerformed(ActionEvent e){                Rekenmachine r = new Rekenmachine();                if(e.getSource() == buttons[1]){                    r.setTextVak();                }                if(e.getSource() == buttons[2]){                    System.out.println("bla");                }            }    }