need help

hi everyone there is someone here who knows java.awt? i have a problem:
my code sounds like this:
i'm having a window with x,y coordonates, i'm reading something from the keyboard, it show's me some results, but BUT my window is closing.. and it must draw some lines with that results.
i put the right functions to draw, but it shows me nothing..
it's like he must transmit my results to that window and draw it..
or: how to draw something in that window with given dates from keyboard..?
some help please??:cry