Java method to return string from JTextField

Question

There is a main method which have different textfields with the same KeyListener class

 textfield1.addKeyListener( new TextfieldKeyListener() );
 textfield2.addKeyListener( new TextfieldKeyListener() );
 textfield3.addKeyListener( new TextfieldKeyListener() );

The KeyListener class is something like this.

public class TextfieldKeyListener implements KeyListener
{

 public void keyTyped( KeyEvent e )
 {

  //This method should get a string from any given textfield.
  system.out.println(textfield.getText().toString() );
 }

}

Is it possible that a KeyListener class takes a string from a textfield and print it? One way is that three textfields should have three KeyListener classes but here should be one KeyListener class for all the textfields.

Answer 1

public class TextfieldKeyListener implements KeyListener {
    public void keyTyped(KeyEvent e) {
        Object src = e.getSource();
        if (src instanceof JTextField) {
            JTextField textField = (JTextField) src;
            System.out.println(textField.getText());
        }
    }
}

Refer to the javadoc