Question

I have a problem in how to addActionListener for a button in static method

here is my static method

private static void initComponents() {


    btnExit = new JButton("Exit");
    btnExit.addActionListener(this);  <==== this is error


}

do you guys have any idea
in how to add a listener so that the button response when clicked

Answer 1

Since it is a static method, there is no this. You can use several options here: anonymous class, new instance of a class which implements ActionListener, … .

Some sample code which uses the anonymous class

  btnExit.addActionListener( new ActionListener() {
    @Override
    public void actionPerformed( ActionEvent aActionEvent ) {
      //do something here
    }
  } );

You might want to read this article about static methods/variables and this article about the this keyword as well to obtain a better understanding on why this will not work in a static context