Problems with array changing elements

I am trying to change elements in an array to the word "empty" with a Jbutton and also add names through a Jtextfield if the in the selected position in the array says empty. For some reason I cant get it to work. here is the code don't know if I am missing something or I am just completely wrong

 move = new JButton("Add Tennant");
        window.add(move);
        moveIn.addActionListener(this);        

        Tennant = new JTextField(FIELD_WIDTH);
        nTennant.setText("Enter new name") ;
        window.add(Tennant);
        Tennant.addActionListener(this);

        evict = new JButton("Evict");
        window.add(evict);
        moveIn.addActionListener(this);

different method:

if(e.getSource() == move)
            {
                if (occupant[selectedApartment].equals("empty"))
                {
                    occupant[selectedApartment] = Tennant.getText();
                }
            }

            if(e.getSource() == evict)
            {
                if(!occupant[selectedApartment].equals("Empty"))
                {
                    occupant[selectedApartment] = "Empty";
                }
            }