action event not fired ?

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Java

I have a frame showing some textfields and a couple of buttons, the classical "Ok" and "Reset" buttons, which are supposed to confirm the values of the textfields (closing the frame) and reset them respectively.
I think I thoroughly followed the "delegation method procedure" for managing event, that is , create the button object, define a listener class (implementing the ActionListener interface) , and add the listener class to the button using the "addActionListener" method . But there's no way to make the whole thing works.
No exception. Only when I click the button the "actionPerformed" method of the listener is simply ignored, as if it didn't exist.
What is the problem ?

Here is the code :

public FrameViewAddEstrazione (String ExtrPath)
        {
            try
            {
                FilePath = ExtrPath;
                
                F = new JFrame ();
                PP = new JPanel(); 
                PD = new JPanel(); // pannello data
                PE = new JPanel(); // pannello estrazioni
                PX = new JPanel(); // pannello pulsanti
                
                F.setLayout (new BoxLayout(F.getContentPane(), BoxLayout.Y_AXIS));
                F.add(PP); F.add(PD); F.add(PE); F.add(PX);
                
                // Path del file estrazioni
                JLabel LP = new JLabel ();
                TP = new JTextField (ExtrPath);
                TP.setColumns(40);
                PP.add (LP); PP.add(TP);

                // Data
                JLabel LYear = new JLabel ("Year"); TYear = new JTextField("",4) ;
                JLabel LMonth = new JLabel ("Month"); TMonth = new JTextField("",2) ;
                JLabel LDay = new JLabel ("Day"); TDay = new JTextField("",2) ;
                PD.add(LYear);  PD.add(TYear);  PD.add(LMonth); PD.add(TMonth); PD.add(LDay); PD.add(TDay);

                // Estrazione
                JLabel EL = new JLabel("Estrazioni");
                E1 = new JTextField ("",2);
                E2 = new JTextField ("",2);    
                E3 = new JTextField ("",2);
                E4 = new JTextField ("",2);
                E5 = new JTextField ("",2); 
                E6 = new JTextField ("",2); 
                PE.add(EL); PE.add (E1); PE.add(E2); PE.add(E3); PE.add(E4); PE.add(E5); PE.add(E6);

                // Pulsanti di conferma / reset
                BOK     = new JButton ("Ok");
                //BOK.setActionCommand("OK");
                BReset  = new JButton ("Reset");
                //BReset.setActionCommand("Reset");
                PX.add (BOK); PX.add(BReset);
                BOK.addActionListener   (this);
                BReset.addActionListener(this);
                
                F.setSize(400, 200);
                F.setVisible(true);
               
            }
            catch (Exception E)
            {
                E = E;
            }
        }
        
        public void actionPerformed(ActionEvent e)
        {
            try
            {
                
                String Cmd = e.getActionCommand();
                String File ="", chunk;    
                BufferedReader S = new BufferedReader (new FileReader (FilePath));
                chunk = S.readLine();
                while (chunk != "")
                {
                    File += chunk;
                    chunk = S.readLine();
                }
                
                if (Cmd == "OK")
                {



                        F.setVisible(false);
                }
                if (Cmd =="Reset")// reset all values
                {
                        TP.setText(FilePath);    
                        TYear.setText(""); TMonth.setText(""); TDay.setText(""); 
                        E1.setText("");
                        E2.setText("");
                        E3.setText("");
                        E4.setText("");
                        E5.setText("");
                        E6.setText("");
                }
            }
            catch (Exception E)
            {
                E=E ;
            }
            
        }