...

<sscce>
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

class Focus {
 public static void main(String[] args) {
  JTextField jTextField = new JTextField(20);
  jTextField.addFocusListener(new FocusListener(){
       public void focusGained(FocusEvent e) {
       }
       public void focusLost(FocusEvent e) {
           // calls getText() and does something with it
           System.out.println(e);
           // ...almost seems you are not doing anything!
        }
     });
  JTextField jTextField2 = new JTextField(20);
  JPanel p = new JPanel();
  p.add(jTextField);
  p.add(jTextField2);
  JOptionPane.showMessageDialog(null,p);
 }
}
</sscce>

Andrew T.