# Error in Processing program
**URL:** https://discourse.processing.org/t/error-in-processing-program/6587
**Category:** Coding Questions
**Created:** [December 14, 2018, 2:33am UTC](https://discourse.processing.org/t/error-in-processing-program/6587 "2018-12-14T02:33:09Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@Smithy](https://discourse.processing.org/u/Smithy)
#### Post date: [December 14, 2018, 2:33am UTC](https://discourse.processing.org/t/error-in-processing-program/6587/1 "2018-12-14T02:33:09Z")
Error in Processing program
Error in Processing program, if you are a genius - come prove it 🙂
Hi everyone, i am currently creating a game in which i have encountered a problem. My sketch isn’t able to run, and i have no idea why. I get the NullPointerEception when trying to run my sketch. When force quitting the java start-up program, my console shows this “Could not run the sketch (Target VM failed to initialise).” By the way, the game i am trying to create is a picture memory game.
Here is my code:
```auto
Cards[] Globalcards = new Cards[12];
int[] x= new int[12];
int[] y = new int[12];
int[] f = new int[12];
void setup() {
int myX = 40;
int myY = 40;
size(500,500);
for(int i = 0; i<12; i++){
x[i] = myX;
y[i] = myY;
f[i] = i + 1;
if (myX<390){
myX += 100;
}
else if (myX>390){
myX = 40;
myY += 120;
}
}
shuffle();
for(int i = 1; i<12; i++){
Globalcards[i] = new Cards (x[i], y[i], f[i]);
}
}
void draw() {
for(int i = 0; i<12; i++){
Globalcards[i].display();
}
if (mousePressed){
flipme();
}
}
void flipme(){
for(int i = 0; i<12; i++){
if (mouseX > x[i] && mouseX<(x[i]+50) && mouseY>(y[i]+120)){
Globalcards[i].displayFront();
}
}
}
void shuffle(){
int z = 0;
int u = 0;
for (int i = 0; i<12; i++){
u = int(random(0,12));
z = f[i];
f[i] = f[u];
f[u] = z;
}
}
```
Here is also the class Cards code i am running with it:
```auto
class Cards {
PImage cardImage;
int show = 0;
int cardX = 0;
int cardY = 0;
int face = 0;
String[] cardTheme = {"japan_style_elements_vector_graphics.png", "e7ca329b9c.png", "83c5bf9c8b.png", "83c5bfa28b.png", "605210998b.png", "83c5bfa48b.png" };
Cards(int x, int y, int f){
cardX = x;
cardY = y;
face = f;
}
void display(){
cardImage = loadImage(cardTheme[show]);
image(cardImage, cardX, cardY);
}
void displayFront(){
show = face;
}
}
```
Finally i have noticed that the program highlights this specific line when it fails to run:
```auto
Globalcards[i].display();
```
I would be grateful for any suggestions or help provided. Thanks.
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 14, 2018, 2:37am UTC](https://discourse.processing.org/t/error-in-processing-program/6587/2 "2018-12-14T02:37:28Z")
you need to make ALL the cards you want use later FIRST
```auto
for(int i = 1; i<12; i++){
Globalcards[i] = new Cards (x[i], y[i], f[i]);
}
```
not fit to
```auto
for(int i = 0; i<12; i++){
Globalcards[i].display();
}
```
so Globalcards[0] is missing
//\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
sorry, you edit the title at the same time
> Error in Processing program,if you are a genius - come prove it 🙂
i never think i am a genius like you
---
### Author:  [@Smithy](https://discourse.processing.org/u/Smithy)
#### Post date: [December 14, 2018, 2:40am UTC](https://discourse.processing.org/t/error-in-processing-program/6587/3 "2018-12-14T02:40:38Z")
Thanks for the reply, i don’t quite understand what you mean… could you please elaborate.
---
### Author:  [@TfGuy44](https://discourse.processing.org/u/TfGuy44)
#### Post date: [December 14, 2018, 2:43am UTC](https://discourse.processing.org/t/error-in-processing-program/6587/4 "2018-12-14T02:43:43Z")
You never set `Globalcards[0]` to be anything!
You have this loop in `setup()`:
```auto
for(int i = 1; i<12; i++){
Globalcards[i] = new Cards (x[i], y[i], f[i]);
}
```
When you actually need this loop:
```auto
for(int i = 0; i<12; i++){
Globalcards[i] = new Cards (x[i], y[i], f[i]);
}
```
Notice that the 1 becomes a 0. This minor change ensures that, in this loop, `Globalcards[0]` is also assigned to be something.
---
### Author:  [@Smithy](https://discourse.processing.org/u/Smithy)
#### Post date: [December 14, 2018, 2:47am UTC](https://discourse.processing.org/t/error-in-processing-program/6587/5 "2018-12-14T02:47:08Z")
Thanks so much, the the code now actually runs. though i realised one of my pictures is way too big… so its covering the whole screen 😮
---
### Author:  [@dan850](https://discourse.processing.org/u/dan850)
#### Post date: [December 14, 2018, 5:43am UTC](https://discourse.processing.org/t/error-in-processing-program/6587/6 "2018-12-14T05:43:35Z")
HI @Smithy, can you repost your question please? it seems like there was an error when you edited your post
---
### Author:  [@quark](https://discourse.processing.org/u/quark)
#### Post date: [December 14, 2018, 9:41am UTC](https://discourse.processing.org/t/error-in-processing-program/6587/7 "2018-12-14T09:41:49Z")
@Smithy has made 3 edits and I suspect he has deliberately destroyed the question. We used to get this a lot on the old forum but this one is nice, click on the pencil in his post and you can see the original question. 😁
Perhaps a moderator can restore the original.
---
### Author:  [@JulietteP](https://discourse.processing.org/u/JulietteP)
#### Post date: [December 14, 2018, 10:04am UTC](https://discourse.processing.org/t/error-in-processing-program/6587/8 "2018-12-14T10:04:31Z")
Why would someone deliberately destroy his question ? I don’t get it.
---
### Author:  [@jb4x](https://discourse.processing.org/u/jb4x)
#### Post date: [December 14, 2018, 2:59pm UTC](https://discourse.processing.org/t/error-in-processing-program/6587/9 "2018-12-14T14:59:01Z")
Maybe it is an assignment and OP doesn’t want his/her teacher to notice the post.
I’m happy you have geniuses here on the forum 🙂
---
### Author:  [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)
#### Post date: [December 14, 2018, 5:05pm UTC](https://discourse.processing.org/t/error-in-processing-program/6587/10 "2018-12-14T17:05:53Z")
> [@quark](#):
>
> Perhaps a moderator can restore the original.
I have restored the post and locked it from future edits. @Smithy
Self-vandalism – especially after forum members have contributed public answers to a public question – is against forum policy. People answer for the good of all, and self-vandalism makes those answers impossible to understand. Self-vandalism also supports cheating on classwork, and this forum does not support cheating – advice should be incorporated into student work in a way that does not need to be a secret. If you want to remove a post with no substantial answers – or if you have a concern about privacy – please flag your post for help from a moderator.