Help with a If statement

I need to have a If statement that does some comparisons. I will have some names of ojbects dm1-dm50. There will be a tining cycle being used in the workout. But if certain dm's are in the workout there will need to be a different timing cycle used. So I need a If statement to check throught the process to replace the timing cycle.  This will happen when the 2 lists used with the wrapper will be making one list to make the single audiofile out of the many. Below is the listener fot the buttons and details classes below.


public class MyListener implements ActionListener {

    private List theList = new ArrayList();

    public MyListener() {
    }

    public void addButton(JButton theButtonToAdd) {
       theButtonToAdd.addActionListener(this);  // Listen for the button to be pressed
    }

    public void actionPerformed(ActionEvent e) {
       JButton button = (JButton)e.getSource();
       String command = button.getActionCommand();
       AudioDetails details = new AudioDetails(command, timing);
       if (thList.contains(details))
       {
          theList.remove(details);
       }
       else
       {
          theList.add(details);
       }
    }




    public List getList() { return theList; }

}


public class AudioDetails
{
   private String AudioFile;
   private String Timing;
   // could add other fields as needed

   public AudioDetails(String file, String timing)
   {
      AudioFile = file;
      Timing = timing;
   }

   public String getAudioFile()
   {
      return AudioFile;
   }

   public String getTiming()
   {
      return Timing;
   }
}