How to add action listener that listens to multiple buttons

Question

I\'m trying to figure out what i am doing wrong with action listeners. I\'m following multiple tutorials and yet netbeans and eclipse are giving me errors when im trying to

Answer 1

I use "e.getActionCommand().contains(CharSecuence s)", since I´m coming from an MVC context, and the Button is declared in the View class, but the actionPerformed call occurs in the controller.

public View() {
    ....
    buttonPlus = new Button("+");
    buttonMinus = new Button("-");
    ....
}

public void addController(ActionListener controller) {
    buttonPlus.addActionListener(controller);
    buttonMinus.addActionListener(controller);
}

My controller class implements ActionListener, and so, when overriding actionPerformed:

public void actionPerformed(ActionEvent e) {
    if(e.getActionCommand().contains("+")) {
        //do some action on the model
    } else if (e.getActionCommand().contains("-")) {
       //do some other action on the model
    }
}

I hope this other answer is also useful.