# Why does my program crash sometimes?
**URL:** https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497
**Category:** Coding Questions
**Created:** [March 1, 2022, 9:55am UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497 "2022-03-01T09:55:32Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@Coder1](https://discourse.processing.org/u/Coder1)
#### Post date: [March 1, 2022, 9:55am UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497/1 "2022-03-01T09:55:32Z")
Hello,
I made a Clan system where you get different advantages based on your clan. However my code does work but sometimes it just crashes and I don’t know why. Please help me
int clanRoll;
String clanName;
int clanColorRed;
int clanColorGreen;
int clanColorBlue;
int blackScreenR = 100;
int clanSpinned = 0;
int timerClanReroll = 0;
int timerLoadGame = 0;
boolean Menu = true;
boolean ClanMenu = false;
boolean BlackScreen = false;
boolean ableToSpin = true;
boolean loadGame = false;
boolean clanBackground = false;
void setup() {
size(displayWidth,displayHeight);
orientation(LANDSCAPE);
}
void draw() {
background(blackScreenR);
if (Menu == true) {
ellipse(width/2,height/2,200,200);
if (BlackScreen == true) {
blackScreenR -= 5;
}
if (blackScreenR \<= 0) {
Menu = false;
//ClanMenu = false;
blackScreenR = 0;
}
}
if (blackScreenR \< 100 && Menu == false && clanBackground == false && ableToSpin == true) {
blackScreenR += 5;
}
if (Menu == false && blackScreenR == 100 && clanBackground == false) {
//background(blackScreenR);
fill(255);
textSize(50);
text(“Clan:”,width/2.5,height/2);
clanSpinned = 1;
}
if (clanBackground == true) {
//background(blackScreenR);
}
if (Menu == false && ClanMenu == false && clanSpinned == 1 && blackScreenR \>= 100) {
frameRate(5);
//background(100);
if (timerClanReroll \< 10) {
clanRoll = (int)random(1,10000);
}
if (timerClanReroll == 10) {
clanRoll = (int)random(1,10000);
}
if (timerClanReroll \> 10) {
loadGame = true;
clanBackground = true;
}
if (clanRoll == 1) {
clanName = “Kamado”;
clanColorRed = 255;
clanColorGreen= 0;
clanColorBlue = 0;
}
else if (clanRoll \<= 100 && clanRoll \> 1) {
clanName = “Himejima”;
clanColorRed = 0;
clanColorGreen= 0;
clanColorBlue = 0;
}
else if (clanRoll \<= 1000 && clanRoll \> 100) {
clanName = “Kanroji”;
clanColorRed = 255;
clanColorGreen= 0;
clanColorBlue = 193;
}
else if (clanRoll \<= 2000 && clanRoll \> 1000) {
clanName = “Shinazugawa”;
clanColorRed = 0;
clanColorGreen= 255;
clanColorBlue = 0;
}
else if (clanRoll \<= 3000 && clanRoll \> 2000) {
clanName = “Tomioka”;
clanColorRed = 0;
clanColorGreen= 0;
clanColorBlue = 255;
}
else if (clanRoll \<= 4000 && clanRoll \> 3000) {
clanName = “Kocho”;
clanColorRed = 168;
clanColorGreen= 12;
clanColorBlue = 232;
}
else if (clanRoll \<= 5000 && clanRoll \> 4000) {
clanName = “Agatsuma”;
clanColorRed = 255;
clanColorGreen= 255;
clanColorBlue = 0;
}
else if (clanRoll \<= 6000 && clanRoll \> 5000) {
clanName = “Tokito”;
clanColorRed = 21;
clanColorGreen= 230;
clanColorBlue = 223;
}
else if (clanRoll \<= 8000 && clanRoll \> 7000) {
clanName = “Uzui”;
clanColorRed = 255;
clanColorGreen= 255;
clanColorBlue = 255;
}
else if (clanRoll \<= 10000 && clanRoll \> 9000) {
clanName = “Hashibira”;
clanColorRed = 43;
clanColorGreen= 181;
clanColorBlue = 194;
}
fill(clanColorRed,clanColorGreen,clanColorBlue);
text(clanName,width/2,height/2);
timerClanReroll++;
}
if (loadGame == true) {
frameRate(60);
timerLoadGame += 100;
if (timerLoadGame \>= 100 && clanBackground == true) {
blackScreenR -= 5;
}
if (blackScreenR == 0 && clanBackground == true) {
ableToSpin = false;
clanBackground = false;
clanSpinned = 0;
}
}
}
void mousePressed() {
if (Menu == true) {
if (dist(mouseX,mouseY,width/2,height/2) \< 100) {
BlackScreen = true;
}
}
}
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [March 1, 2022, 11:45am UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497/2 "2022-03-01T11:45:48Z")
More information needed
Do you get an error message?
When does it crash exactly? What happens before?
---
### Author:  [@Coder1](https://discourse.processing.org/u/Coder1)
#### Post date: [March 1, 2022, 12:07pm UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497/3 "2022-03-01T12:07:41Z")
-So when you start the programm there is a white circle which you have to click on. Then you get a “Clan” assigned randomly. Then the background turns black because I wanted it to connect to my game but this is not really important.
-The programm sometimes crashes when you are about to get a “Clan”. But the programm doesn’t always crash. Sometimes it works perfectly but sometimes it crashes.
-This is what I get as an error:
java.lang.NullPointerException: Attempt to invoke virtual method ‘int java.lang.String.length()’ on a null object reference
---
### Author:  [@glv](https://discourse.processing.org/u/glv)
#### Post date: [March 1, 2022, 1:04pm UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497/4 "2022-03-01T13:04:55Z")
Hello,
Related topic:
> [@Why am I having the NullPointerException error?](https://discourse.processing.org/t/why-am-i-having-the-nullpointerexception-error/31876/3):
>
> Hello, Try this: String FileName = ""; [image] I created a test.iL7 to test. Reference: [https://forum.processing.org/two/discussion/8071/why-do-i-get-a-nullpointerexception](https://forum.processing.org/two/discussion/8071/why-do-i-get-a-nullpointerexception)slight_smile
Where did you get the error? These may be highlighted when found as in example below.
I am seeing this error with your code:
Example:
```auto
// String s; // s is not initialized and is a null
String s = ""; // s is initialized and not a null
void setup()
{
text(s, 0, 0);
}
```
Please format your code as a courtesy to our community:
[https://discourse.processing.org/faq#format-your-code](https://discourse.processing.org/faq#format-your-code)
`:)`
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [March 1, 2022, 1:04pm UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497/5 "2022-03-01T13:04:58Z")
This error message is very important here
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [March 1, 2022, 1:10pm UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497/6 "2022-03-01T13:10:46Z")
> [@Coder1](#):
>
> clanRoll
You don’t evaluate this completely
I think you miss 6000 to 7000 and 9000 to 10000
Check this
then clanName is undefined I guess
An else block at the end of the if…else if… block might help where you can say println (clanRoll);
---
### Author:  [@jafal](https://discourse.processing.org/u/jafal)
#### Post date: [March 1, 2022, 3:51pm UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497/7 "2022-03-01T15:51:23Z")
hi
try this
```auto
int clanRoll;
String d= "clanName";
int clanColorRed;
int clanColorGreen;
int clanColorBlue;
int blackScreenR = 100;
int clanSpinned = 0;
int timerClanReroll = 0;
int timerLoadGame = 0;
boolean Menu = true;
boolean ClanMenu = false;
boolean BlackScreen = false;
boolean ableToSpin = true;
boolean loadGame = false;
boolean clanBackground = false;
void setup() {
size(displayWidth, displayHeight);
orientation(LANDSCAPE);
}
void draw() {
background(blackScreenR);
if (Menu == true) {
ellipse(width/2, height/2, 200, 200);
if (BlackScreen == true) {
blackScreenR -= 5;
}
if (blackScreenR <= 0) {
Menu = false;
//ClanMenu = false;
blackScreenR = 0;
}
}
if (blackScreenR < 100 && Menu == false && clanBackground == false && ableToSpin == true) {
blackScreenR += 5;
}
if (Menu == false && blackScreenR == 100 && clanBackground == false) {
//background(blackScreenR);
fill(255);
textSize(50);
text("Clan:", width/2.5, height/2);
clanSpinned = 1;
}
if (clanBackground == true) {
//background(blackScreenR);
}
if (Menu == false && ClanMenu == false && clanSpinned == 1 && blackScreenR >= 100) {
frameRate(5);
//background(100);
if (timerClanReroll < 10) {
clanRoll = (int)random(1, 10000);
}
if (timerClanReroll == 10) {
clanRoll = (int)random(1, 10000);
}
if (timerClanReroll > 10) {
loadGame = true;
clanBackground = true;
}
if (clanRoll == 1) {
d = "Kamado";
clanColorRed = 255;
clanColorGreen= 0;
clanColorBlue = 0;
} else if (clanRoll <= 100 && clanRoll > 1) {
d = "Himejima";
clanColorRed = 0;
clanColorGreen= 0;
clanColorBlue = 0;
} else if (clanRoll <= 1000 && clanRoll > 100) {
d = "Kanroji";
clanColorRed = 255;
clanColorGreen= 0;
clanColorBlue = 193;
} else if (clanRoll <= 2000 && clanRoll > 1000) {
d = "Shinazugawa";
clanColorRed = 0;
clanColorGreen= 255;
clanColorBlue = 0;
} else if (clanRoll <= 3000 && clanRoll > 2000) {
d= "Tomioka";
clanColorRed = 0;
clanColorGreen= 0;
clanColorBlue = 255;
} else if (clanRoll <= 4000 && clanRoll > 3000) {
d= "Kocho";
clanColorRed = 168;
clanColorGreen= 12;
clanColorBlue = 232;
} else if (clanRoll <= 5000 && clanRoll > 4000) {
d = "Agatsuma";
clanColorRed = 255;
clanColorGreen= 255;
clanColorBlue = 0;
} else if (clanRoll <= 6000 && clanRoll > 5000) {
d = "Tokito";
clanColorRed = 21;
clanColorGreen= 230;
clanColorBlue = 223;
} else if (clanRoll <= 8000 && clanRoll > 7000) {
d= "Uzui";
clanColorRed = 255;
clanColorGreen= 255;
clanColorBlue = 255;
} else if (clanRoll <= 10000 && clanRoll > 9000) {
d = "Hashibira";
clanColorRed = 43;
clanColorGreen= 181;
clanColorBlue = 194;
}
fill(clanColorRed, clanColorGreen, clanColorBlue);
text(d, width/2, height/2);
timerClanReroll++;
}
if (loadGame == true) {
frameRate(60);
timerLoadGame += 100;
if (timerLoadGame >= 100 && clanBackground == true) {
blackScreenR -= 5;
}
if (blackScreenR == 0 && clanBackground == true) {
ableToSpin = false;
clanBackground = false;
clanSpinned = 0;
}
}
}
void mousePressed() {
if (Menu == true) {
if (dist(mouseX, mouseY, width/2, height/2) < 100) {
BlackScreen = true;
}
}
}
```
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [March 1, 2022, 4:44pm UTC](https://discourse.processing.org/t/why-does-my-program-crash-sometimes/35497/8 "2022-03-01T16:44:58Z")
Thanks for that.
Here is my version:
```auto
int clanRoll;
String clanName="";
int clanColorRed;
int clanColorGreen;
int clanColorBlue;
int blackScreenR = 100;
int clanSpinned = 0;
int timerClanReroll = 0;
int timerLoadGame = 0;
boolean Menu = true;
boolean ClanMenu = false;
boolean BlackScreen = false;
boolean ableToSpin = true;
boolean loadGame = false;
boolean clanBackground = false;
// ------------------------------------------------------------------------------------
// setup() and draw()
void setup() {
size(displayWidth, displayHeight);
orientation(LANDSCAPE);
}
void draw() {
background(blackScreenR);
if (Menu) {
drawForMenu();
} else {
drawForMenuIsOver();
}
}//draw()
//---------------------------------------------------------------------------------------
//called directly by draw()
void drawForMenu() {
fill(255);
ellipse(width/2, height/2, 200, 200);
if (BlackScreen == true) {
blackScreenR -= 5;
}
if (blackScreenR <= 0) {
Menu = false;
//ClanMenu = false;
blackScreenR = 0;
}
}
void drawForMenuIsOver() {
if (blackScreenR < 100 && clanBackground == false && ableToSpin == true) {
blackScreenR += 5;
}
if (blackScreenR == 100 && clanBackground == false) {
//background(blackScreenR);
fill(255);
textSize(50);
text("Clan:", width/2.5, height/2);
clanSpinned = 1;
}
// if (clanBackground == true) {
//background(blackScreenR);
// }
if (ClanMenu == false && clanSpinned == 1 && blackScreenR >= 100) {
frameRate(5);
if (timerClanReroll < 10) {
clanRoll = (int)random(1, 10000);
}
if (timerClanReroll == 10) {
clanRoll = (int)random(1, 10000);
}
if (timerClanReroll > 10) {
loadGame = true;
clanBackground = true;
}
// -----
//
evalClanRoll();
fill(clanColorRed, clanColorGreen, clanColorBlue);
text(clanName, width/2, height/2);
timerClanReroll++;
}
// ---
if (loadGame) {
frameRate(60);
timerLoadGame += 100;
if (timerLoadGame >= 100 && clanBackground) {
blackScreenR -= 5;
}
if (blackScreenR == 0 && clanBackground) {
ableToSpin = false;
clanBackground = false;
clanSpinned = 0;
}
}
}
// -----------------------------------------------------------------------------------
// secondary functions to that
void evalClanRoll() {
//
if (clanRoll == 1) {
clanName = "Kamado";
clanColorRed = 255;
clanColorGreen= 0;
clanColorBlue = 0;
} else if (clanRoll <= 100 && clanRoll > 1) {
clanName = "Himejima";
clanColorRed = 111;
clanColorGreen= 111;
clanColorBlue = 111;
} else if (clanRoll <= 1000 && clanRoll > 100) {
clanName = "Kanroji";
clanColorRed = 255;
clanColorGreen= 0;
clanColorBlue = 193;
} else if (clanRoll <= 2000 && clanRoll > 1000) {
clanName = "Shinazugawa";
clanColorRed = 0;
clanColorGreen= 255;
clanColorBlue = 0;
} else if (clanRoll <= 3000 && clanRoll > 2000) {
clanName = "Tomioka";
clanColorRed = 0;
clanColorGreen= 0;
clanColorBlue = 255;
} else if (clanRoll <= 4000 && clanRoll > 3000) {
clanName = "Kocho";
clanColorRed = 168;
clanColorGreen= 12;
clanColorBlue = 232;
} else if (clanRoll <= 5000 && clanRoll > 4000) {
clanName = "Agatsuma";
clanColorRed = 255;
clanColorGreen= 255;
clanColorBlue = 0;
} else if (clanRoll <= 6000 && clanRoll > 5000) {
clanName = "Tokito";
clanColorRed = 21;
clanColorGreen= 230;
clanColorBlue = 223;
} else if (clanRoll <= 8000 && clanRoll > 7000) {
clanName = "Uzui";
clanColorRed = 255;
clanColorGreen= 255;
clanColorBlue = 255;
} else if (clanRoll <= 10000 && clanRoll > 9000) {
clanName = "Hashibira";
clanColorRed = 43;
clanColorGreen= 181;
clanColorBlue = 194;
} else {
println("Error: reached else: with " +clanRoll);
}// else
}//
void mousePressed() {
if (Menu) {
if (dist(mouseX, mouseY, width/2, height/2) < 100) {
BlackScreen = true;
}
}
}
//
```