Hello, I'm trying to make a run and jump type mini-game thing, and I'm having difficulties with multiple keys.   I picked option 2 from this site: http://wiki.processing.org/w/Multiple_key_presses and it worked well to do the 2 keys at once.  However, if I let go of the second key I pressed down, it also reads it as I let go of the first one, too....Is there a good way to fix this?

1. void setup(){
2.   size(400,400);
3.   a=loadImage("map.png");
4.   x=0;
5.   y=200;
6. }
7. PImage a;
8. int x,y;
9. boolean[] keys=new boolean[526];
10. boolean checkKey(int k){
11.     if (keys.length >= k) {
12.       return keys[k]; 
13.     }
14.     return false;
15. }
16. void draw(){
17.   background(0);
18.   image(a,x,0);
19.   if(keyPressed){
20.     if(checkKey(LEFT)){
21.       if(x<=0){
22.         x+=2;
23.       }
24.     }
25.     if(checkKey(UP)){
26.       y-=2;
27.     }
28.     if(checkKey(RIGHT)){
29.       x-=2;
30.     }
31.   }
32.   fill(100,0,0);
33.   ellipse(200,y,50,50);
34. }
35. void keyPressed(){
36.   keys[keyCode]=true;
37. }
38. void keyReleased(){
39.   keys[keyCode]=false;
40. }

Thanks for the help