数组更改元素的问题

Question

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";
    }
}

Answer 1

The first thing that jumps out at me is you use occupant[selectedApartment] = "Empty"; to set an apartment empty, but use if (occupant[selectedApartment].equals("empty")) to test if an apartment is empty

"Empty" != "empty"

You could change

if (occupant[selectedApartment].equals("empty"))

to

if (occupant[selectedApartment].equals("Empty"))

or use

if (occupant[selectedApartment].equalsIgnoreCase("empty"))

or change

occupant[selectedApartment] = "Empty";

to

occupant[selectedApartment] = "empty";