Reference outer class instance from inner class

Question

I wanted to pass the exact instance that was created in the main method to the new Executor which has a MPGui as a parameter. Is this possible?

public class MPGui {
  public MPGui() {
    //initialize GUI
  }

  public class ExecuteListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {

      Executor execu = new Executor(MLA, /*the MPGUI() instance */);
      execu.execute();          
    }
  }

  public static void main(String[] args) {
    MPGui a = new MPGui();
  }
}

This kind of depends on how you plan to use `ExecuteListener`. One obvious solution is to create a constructor for it and pass the MPGui instance to it. You've shown it as an inner class though. What @subtenante says might be what you are looking for. — Radiodef, Jan 21 '14 at 09:10

score 5 · Accepted Answer · answered Jan 21 '14 at 08:59

Try this (well.... MPGUI.this actually):

public class MPGui {
        public MPGui() {
                //initialize GUI
        }

        public class ExecuteListener implements ActionListener {
                public void actionPerformed(ActionEvent e) {

                        Executor execu = new Executor(MLA, MPGUI.this);
                        execu.execute();

                }
        }

        public static void main(String[] args) {
                MPGui a = new MPGui();
        }
}

Nothing like an answer... and a pun! :-) – Duncan Jones Jan 21 '14 at 09:01 — Duncan Jones, Jan 21 '14 at 09:01

Reference outer class instance from inner class

1 Answers1

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