swing - Problems with Java's Paint method, ridiculous refresh velocity -

i'm developing simple version of r-type work university, despite works, craft velocity lot of slow, movement ugly , clumsy. use method repaint refresh screen, there others methods or ways best it?

video of movement

paint method @ main panel

@override     public void paint(graphics g) {         super.paint(g);         graphics2d g2 = (graphics2d) g;         g2.setrenderinghint(renderinghints.key_antialiasing,         renderinghints.value_antialias_on);         g2.drawimage(fondo, 0, 0,1200,600,this);         pj.paint(g2);         g2d=g2;      } 

pj's paint method

public void paint(graphics2d g) {      g.drawimage(imagen,x,y,this); } 

pj's move method

public void move (keyevent e)  {     int dx = 0; int dy = 0;     int code = e.getkeycode();      switch (code) {     case keyevent.vk_q: dy-=1; break;     case keyevent.vk_a: dy+=1; break;     case keyevent.vk_p: dx+=1; break;     case keyevent.vk_o: dx-=1; break;     }      int x = (getx()<maxx&&getx()!=0) ? getx()+dx : getx();     int y = (gety()<maxy&&gety()!=0) ? gety()+dy : gety();      if (gety()>=maxy||gety()==0) {         if (dy==+1) y=y+1;     }      setposicion(x, y);   } 

• the image fondo should scaled 1200x600.
• i not sure, super.paint(g) needed? might use paintcomponent.

the event handling (you seem moving 1 pixel on key down), must done correctly. have set direction , speed (1px), , leave swing timer continuous moving.

repainting best done resilient/flexible: repaint(20l) (50 frames per second); events key-down maybe eventqueue.invokelater(new runnable() { ... });.

especially might use repaint changed area.