title: ComponentListener is not working
body: <p>Please have a look at the following code.</p>
  
  <pre><code>package normal;
  
  import java.awt.*;
  import java.awt.event.*;
  import javax.swing.*;
  import javax.swing.event.ChangeEvent;
  import javax.swing.event.ChangeListener;
  
  public class MainForm extends JFrame implements ComponentListener
  {
      private JTabbedPane tab;
  
      private InsertForm insertForm;
      private UpdateDeleteForm updateDelete;
      private SearchForm searchForm;
  
      public MainForm()
      {
          tab = new JTabbedPane();
          insertForm = new InsertForm();
          updateDelete = new UpdateDeleteForm();
          searchForm = new SearchForm();
  
          //Creating the main window
          tab.add(insertForm,"Insert");
          tab.add(updateDelete,"Update/Delete");
          tab.add(searchForm,"Search");
          tab.addChangeListener(new TabChangeWork());
  
          getContentPane().add(tab);
  
  
  
  
         // this.setSize(500,500);
          this.setTitle("My Phone Book App");
          this.setResizable(false);
          this.pack();
          this.validate();
          this.setLocationRelativeTo(null);
          this.setVisible(true);
          this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
      }
  
      @Override
      public void componentResized(ComponentEvent e) {
          throw new UnsupportedOperationException("Not supported yet.");
      }
  
      @Override
      public void componentMoved(ComponentEvent e)
      {
          System.out.println("X Location: "+this.getX());
      }
  
      @Override
      public void componentShown(ComponentEvent e) {
          throw new UnsupportedOperationException("Not supported yet.");
      }
  
      @Override
      public void componentHidden(ComponentEvent e) {
          throw new UnsupportedOperationException("Not supported yet.");
      }
  
      private class TabChangeWork implements ChangeListener
      {
  
          @Override
          public void stateChanged(ChangeEvent e) 
          {
              JTabbedPane tabSource = (JTabbedPane)e.getSource();
  
              int index = tabSource.getSelectedIndex();
              System.out.println("Tab Changed to: "+tabSource.getTitleAt(index));
  
  
              if(tabSource.getTitleAt(index).equals("Update/Delete"))
              {
                  updateDelete.addNames();
              }
          }
  
      }
  }
  </code></pre>
  
  <p>In here, the ComponentListener is not working properly because the action inside the method "ComponentMoved" is not happening. I am trying to the get the new coordinates of the JFrame if this is moved. Why it is not working? Please help!!</p>