> 2 -   i add keypress event handler to text box
> this eventhandler is called before the data changes inside the textbox
> so i recall keypress handler twice to get the data change after every
> key press.   this is a work around,  how can i handle the data change
> after a keypress
>
Use the KeyUpEvent/Handler if you want the already updated data via 
textBox.getText().

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