Question

So I need to get the “i” out of this loop put into a variable outside of this loop (I want this to happen when a button is clicked) using an action-listener…
Any idea how to to this?

ArrayList<Kaart> Thand=uno.gethSpeler().getHand();
for(int i=0;i<Thand.size();i++){
  btnArr[i].setIcon(Thand.get(i).getImg());
  btnArr[i].addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
      iKaart=i;
    }
  });
}

Answer 1

I think you want this – just creating a final variable within the loop, taking its value from i, so that you can refer to it in your anonymous inner class:

ArrayList<Kaart> thand = uno.gethSpeler().getHand();

for(int i=0; i < thand.size(); i++) {
  final int copy = i;
  btnArr[i].setIcon(thand.get(i).getImg());

  btnArr[i].addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
      iKaart = copy;
    }
  });
}