class MyActionListener implements ActionListener {

        // Process user's action in JTextField input

        public void actionPerformed( ActionEvent e) {

            String outputStr = "";



                String numberStr = textfield1.getText();
		int numb = 0;
                if ((numberStr != null) && (numberStr.length()) > 0) {
		    numb = Integer.parseInt(numberStr);
 
		}
               if (( entryCount < MAX_NUMBERS ) && ( numb <= 300 ))  {
                    dataValue[entryCount] = numb;

                    entryCount++;
                    textfield1.setText("");

                    outputStr = "The array values: " + arrayToString(dataValue, entryCount);

                    JOptionPane.showMessageDialog(null, outputStr, "Results",

                                         JOptionPane.INFORMATION_MESSAGE);

                

            } else {

                cannotAddFlag = true;

            }           

            displayData();

        }

    }