Question

I have this (partially pseudo)code

class a {
  void b()
  {
    int d = 0;
    JButton c = new JButton();
    c.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e)
      {
        d = 1;
      }
    });
  }
}

However, it doesn’t work, eclipse suggested adding final identifier to d, but that makes value impossible to change. Sorry if it’s a stupid question, but it’s hard to form a question for Google for something like this…
I also can’t declare variable on lever higher than method b.

Answer 1

You probably want to move declaration of d outside of the method.

class a {
  int d = 0;

  method b() {
    JButton c = new JButton();
    c.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
      d = 1;
    }
  }

}

..and format your code.