how to make 2d graphic in java without repaint()? -

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i want draw rectangles in different timesets, when draw first rectangle paint(), use paint() draw second 1 first rectangle disappear. found image override previos one. how can without recreating previous ones(like not using repaint())? appreciate every answer:d

public static class screen extends frame      {          int width = 900;         static int[][] map = new int[700][700];         public screen()          {             super("clash of tank");             setsize(width, width);             addwindowlistener(new windowadapter()              {                 public void windowclosing(windowevent e)                  {                     system.exit(0);                 }             });         }           public void paint(graphics g) {             bufferedimage image = (bufferedimage) createimage(700,700);             graphics g2 = image.getgraphics();             drawtank(g2);             g.drawimage(image, 325, 35, this);         }           void drawtank(graphics g) {              g.setcolor(color.black);             for(int = 0; i<=690; i+=1)                 for(int j = 0; j<=690; j+=1)                     {                         if(map[i][j]==0)                             g.setcolor(color.black);                         if((map[i][j]==1))                             g.setcolor(color.blue);                         if((map[i][j]==2))                             g.setcolor(color.red);                         if((map[i][j]==3))                             g.setcolor(color.green);                         if((map[i][j]==4))                             g.setcolor(color.yellow);                         g.fillrect(i, j, 1, 1);                     }            }      }   public class clashoftanks  {     public static void main(string[] args) throws exception      {         screen t = new screen();          t.setvisible(true);         t.repaint();     } }

yours classic xy problem ask specific solution solve wrong way something.

the key should use repaint(), should either store collection of rectangles , draw them in loop in paint or paintcomponent method (if using swing), or else draw them bufferedimage , draw that in painting method. don't forget call super paint or paintcomponent method.


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