Thread: havig problems with "this " refrence

hi friend i am having problem with " this" refernce when it is passed as an agrument in any method . as everbody knows this alawys point to current live object , i am having few doubts about it . if any body has tutorial which explains is in details then plz provide me the link. a video would like icing on cake.here i am goin to post an j2me code plz help me to understand it

import javax.microedition.lcdui.*;
public class demo extends MIDlet implements CommandListener
{
      Form d1;
      TextField t1,t2;
      Command c1;
      Alert alert;
   public void startApp()
    {
       d1=new Form("Form1");
       t1=new TextField("Enter Your Name","",10,TextField.ANY);
     t2=new TextField("","",20,TextField.ANY);
    Command c1=new Command("OK",Command.SCREEN,0);
    Command c2=new Command("Exit",Command.SCREEN,0);
    alert=new Alert("Field Empty","Text Field is empty",null,AlertType.ERROR);
 
    d1.append(t1);
    d1.append(t2);
    d1.addCommand(c1);
    d1.addCommand(c2);
     d1.setCommandListener(this);
[COLOR="Red"][SIZE="3"]
// i want to know about which object to "this"  keyword is poiniting .  is pointing  to "d1"?  is it possible to that "this" to/or can be made point to other object other than "d1" [/SIZE] [/COLOR]
 
    Display.getDisplay(this).setCurrent(d1);
[COLOR="Red"][SIZE="3"]//is "this" here pointing to DISPLAY OBJECT or any other [/SIZE][/COLOR]
     }
 
   public void pauseApp() 
   {}
   public void destroyApp(boolean unconditional)
  {
       notifyDestroyed();
  }
   public void commandAction(Command c,Displayable d)
    {
               String lbl1=c.getLabel();
               String lbl=t1.getString();
 
               if(lbl.equals(""))
                   {
                      t2.setString("Field Empty");
                    }
             else
                     {
                      t2.setString("Hello  "+lbl);
                      } 
    }
}

thanks
anoop