Threads... how to stop / change to other..

I have two classes; UiControl an UI. In UiControl I handle which form to show etc. and UI is showing them and there are some commandListeners also.
I have methods show() and showInfo in class UI.
class UI implements Runnable
public void show(Displayable dp)
     display.setCurrent(dp);
public void showInfo(Displayable dp)
     this.setDisplayable(dp);
     Thread tr = new Thread();
     tr.start();
public void run()
        display.setCurrent(displayable);
}Here (in class UI)I have these methods I use to show forms. ShowInfo is used because sometimes "splashscreen-typeOfInfo" have to be transmitted to user right after somebutton is pressed and show() method waits that tasks commandLiesteners started in other parts of application are finished and only after that then updates screen, which is too late when come to think of usability.
The question / problem is that now I use show()-method once, then I repeatedly use showInfo() few times, and after that once again show(). After that showInfo() gets called (I can verify that when debugging), but nothing comes to screen...
Any ideas how to fix this?
Thanks in advace.
P_p

Sorry.. copy/paste error from code.
Thread tr = new Thread();should be:
Thread tr = new Thread(this);P_p

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