# Having keyPressed() in multiple classes
**URL:** https://discourse.processing.org/t/having-keypressed-in-multiple-classes/26401
**Category:** Beginners
**Created:** [December 20, 2020, 3:24pm UTC](https://discourse.processing.org/t/having-keypressed-in-multiple-classes/26401 "2020-12-20T15:24:55Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@gapigapi](https://discourse.processing.org/u/gapigapi)
#### Post date: [December 20, 2020, 3:24pm UTC](https://discourse.processing.org/t/having-keypressed-in-multiple-classes/26401/1 "2020-12-20T15:24:55Z")
> I am having some problems with void keypress() function. If i use it in the main class it works, but if i then try to call a class where i do the maths and then draw() which works in that class and draw on canvas created in main class, but the keypress function doesn’t trigger when i type in that class. I tried to add another setup() in that class but it didn’t change anything.
> The problem is also that if i want to change things from main class by keypress is that i have to always create a new clusters class or i can’t call it’s functions but i don’t want to do that. I want to change the class that i already created.
> \< code:
> class clusters (){
> void draw(){
> draws on canvas…
> }
> void keyPressed(){
> print(key);
> switch(key){
> case ‘x’:
> zoom+=0.5;
> firstdraw=true;
> break;
> case ‘y’:
> zoom-=0.5;
> firstdraw=true;
> break;
> }
> }
> } \<
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [December 20, 2020, 4:58pm UTC](https://discourse.processing.org/t/having-keypressed-in-multiple-classes/26401/2 "2020-12-20T16:58:12Z")
> [@gapigapi](#):
>
> If i use it in the main class it works, but if i then try to call a class where i do the maths
Yeah, keys are not automatically passed to the class(es) - you have to call your keyPressed located inside the class from the main keyPressed. I can make an example if you want.
in the main part of the Sketch
```auto
void keyPressed() {
player.keyPressed();
}
```
in the Player class :
```auto
void keyPressed() {
switch(key) {
case '1':
//
break;
}//switch
}//method
```
> [@gapigapi](#):
>
> The problem is also that if i want to change things from main class by keypressed is that i have to always create a new clusters class or i can’t call it’s functions but i don’t want to do that.
Not sure if I understand you there. To make a new class or new objects from the class is not the right way. Instead you change its values by saying player.x++, (call this ouside the class) or make a method moveRight() in the class and call it like player.moveRight();
**Hey, and welcome to the forum!**
**Great to have you here!**
Warm regards,
Chrisir 😉
P.S.
Here is a full example:
```auto
Clusters c = new Clusters();
void setup() {
// init
size(1300, 700);
} // func
void draw() {
// runs on and on
background(0);
c.draw();
}
void keyPressed() {
c.keyPressed();
}
// ===============================================================
class Clusters {
float x=300, y=300;
void draw() {
//draws on canvas…
ellipse(x, y, 18, 18);
}
void keyPressed() {
print(key);
switch(key) {
case 'x':
x+=5;
//firstdraw=true;
break;
case 'y':
y-=0.5;
//firstdraw=true;
break;
}//switch
}//func
}//class
//
```
---
### Author:  [@gapigapi](https://discourse.processing.org/u/gapigapi)
#### Post date: [December 20, 2020, 6:53pm UTC](https://discourse.processing.org/t/having-keypressed-in-multiple-classes/26401/3 "2020-12-20T18:53:30Z")
Well u get errors saying the sketch path is not set.
And then about 20 lines where it crashes and at the end runtimeexception: java.lang.reflect.invocationtargetexception.
FIXED IT:
needed to only initialize the variable above setup as \ maybe because i had arguments that i put to class that the error had acoured.