Java and Myro breakout game program closes early -

i'm working classic breakout game java , myro. program loads ball , paddle, closes program.

what want the collection of myrobricks appear @ top of window , ball moves in random directions , bouncing off paddle. when hits 1 of bricks brick disappear , ball bounces.

here code:

import myro.*; import java.util.*; import java.awt.*;   public class breakout { // declare scribbler object private scribbler robot;  private boolean intersects( myroshape s1, myroshape s2 ) {     if( s1.gettop() >= s2.getbottom() || s1.getbottom() <= s2.gettop() || s1.getleft() >= s2.getright() || s1.getright() <= s2.getleft() )         return false;     else         return true; }  public void main() {   //set canvas has 500 width, 500 height     final int width = 500;     final int height = 500;     myrocanvas mycanvas = new myrocanvas( "breakout",width, height );      int brickx = 0;     int bricky = 60;      //creating collection of bricks     collection<myrorectangle> bricks = new arraylist<myrorectangle>();      //create rectangle(the paddle)     myrorectangle paddle = new myrorectangle( mycanvas, 205, 475, 90, 25 );     //make visible     paddle.makefilled();     paddle.setfillcolor( color.green );     paddle.visible();     //create ball     myrocircle ball = new myrocircle( mycanvas, 250, 465, 10 );     ball.makefilled();     ball.setfillcolor( color.blue );     ball.visible();     //choose random delta x(negative) & y(not 0)     int deltax = myroutils.randomint( -4,-1 );     int deltay = myroutils.randomint(-4, 4);     //if chooses zero, 1      mycanvas.setautorepaint( false );      ( int c = 0; c<9; c++ )     {         brickx = 0;         (int r = 0; c<4; c++)         {              myrorectangle rectangles = new myrorectangle( mycanvas, brickx, bricky, 50, 20 );              int red = myroutils.randomint (0, 255);             int green = myroutils.randomint (0, 255);             int blue = myroutils.randomint (0, 255);              rectangles.setfillcolor( new color (red, green, blue ));             rectangles.makefilled();             rectangles.visible();             bricks.add( rectangles );             brickx = brickx + 50;         }         bricky = bricky + 20;     }     while (deltay == 0)     {         deltay = myroutils.randomint(-4, 4);     }     boolean finished = false;     while (!finished)     {         ball.move( deltax, deltay );         myroutils.sleep( 0.01);         int brickscount = 40;         //implementing paddle controlled , d keys         if( myrolistener.iskeypressed() )         {             if( myrolistener.whichkey() == 'q' )             {                 // quit                 finished = true;             }             else if( myrolistener.whichkey() == 'a' )             {                 paddle.move( -4,0 );                 if( paddle.getleft() < 0 )                 {                     paddle.move( 0, 0 );                 }             }             else if( myrolistener.whichkey() == 'd' )             {                 paddle.move( 4,0 );                 if( paddle.getright() > 500 )                 {                     paddle.move( 0, 0 );                 }             }         }          if ( ball.getbottom() == 500 )             finished = true;          if ( ball.getbottom()==0 )             ball.move(deltax,-deltay);          if ( ball.getleft()==0 || ball.getright()==500 )             ball.move(-deltax, deltay);          if( intersects( ball, paddle ))             ball.move(deltax,-deltay);          mycanvas.repaint();          (myrorectangle rectangles : bricks)         {             if(rectangles.isvisible() && intersects( ball, rectangles ))             {                 rectangles.invisible();                 deltay = -deltay;                 brickscount--;             }         }         if( brickscount == 0 )         {             finished = true;             myrogui.telluser( "congratulation!" );         }         mycanvas.setvisible( false );     } } } 

any ideas wrong code?

i think problem :

mycanvas.setvisible( false );

before statement canvas visible, change to:

mycanvas.setvisible( true );

see difference. if it's not solution, shouldn't leave statement there, jpanel.setvisible() method serves set panel visible user if set true, , setting panel invisible after display itself. doesn't close running program if intention.