Add a actionlistener to JTextArea and print out string when the user input

Question

Hello:
I got a problem to add a actionlistener to JTextArea and print out string which from the user input a sentence and after the user press the "enter".
Could anyone help me please?
Thanks
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.JScrollBar;
public class PanelDemo extends JFrame {
   private static JTextArea tAreaUp, tAreaDown;
   private BorderLayout layout;
   private static String strings;
   public PanelDemo()
      super( " test " );
      Container container = getContentPane();
      layout = new BorderLayout();
      container.setLayout( layout );
      tAreaUp = new JTextArea(2,1);
      tAreaUp.setLineWrap(true);
      tAreaUp.setWrapStyleWord(true);
      tAreaUp.setEditable(false);
      tAreaUp.append("I am testing ");
      tAreaUp.append("I am testing");
       JScrollPane scrollPane = new JScrollPane(tAreaUp);
       scrollPane.setVerticalScrollBarPolicy(
                        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
       scrollPane.setPreferredSize(new Dimension(250, 250));
      tAreaDown =new JTextArea(2,1);
      tAreaDown.setLineWrap(true);
      tAreaDown.setWrapStyleWord(true);
      tAreaDown.addActionListener(new TextAreaHandler());
      JScrollPane scrollPane2 = new JScrollPane(tAreaDown);
      scrollPane2.setVerticalScrollBarPolicy(
                        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
      container.add( scrollPane, layout.CENTER );
      container.add( scrollPane2, layout.SOUTH );
      setSize( 300, 300 );
      setVisible( true );
     //private inner class for event handling
     private class TextAreaHandler implements ActionListener{
          //process textArea events
        public void actionPerformed(ActionEvent e){
           strings=e.getActionCommand();
            System.out.println(strings);
   public static void main( String args[] )
      PanelDemo application = new PanelDemo();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}

Answer 1

Thanks for your help, but I still got a question for you.
Do you think the way I register the even handler to the TextArea is correct?
Because the compailer complains about that which like
"D:\101\fig13_27\PanelDemo.java:43: cannot resolve symbol
symbol  : method addActionListener (PanelDemo.TextAreaHandler)
location: class javax.swing.JTextArea
      tAreaDown.addActionListener(new TextAreaHandler());