ArrayIndexOutofBoundsException ERROR

Core Library Questions

fach2k9

ArrayIndexOutofBoundsException ERROR

in Core Library Questions • 10 months ago

Why this is saying ArrayIndexOutofBoundsException: 0

import processing.serial.*;

Serial myPort;

float brightness = 0;

void setup () {

size (1000, 600);

colorMode(RGB);

println(Serial.list());

myPort = new Serial(this, Serial.list()[0], 9600);

}

void draw () {

background (1);

while (myPort.available()>0){

int inByte = myPort.read();

fill(inByte);

beginShape(QUADS);

vertex(0, 0);

vertex(250, 0);

vertex(250, 150);

vertex(0, 150);

endShape(CLOSE);

}

Replies(6)

asimes

Re: ArrayIndexOutofBoundsException ERROR

10 months ago

Well, I don't have an Arduino hooked up so I can't run your code, but it looks like your highlighted line is making an array of length 0:

Copy code

myPort = new Serial(this, Serial.list()[0], 9600);

fach2k9

Re: ArrayIndexOutofBoundsException ERROR

10 months ago

Hi asimes,

Thanks for your reply. Yes that line is the one that is giving me the array of length 0. Do you know how can I fix it?

Can I use this code for PIC?

Thanks

Regards

asimes

Re: ArrayIndexOutofBoundsException ERROR

10 months ago

I'm not 100% sure it will fix it, by try making that 0 bigger. If that is an array of length 0, then it can't store elements

PhiLho

Re: ArrayIndexOutofBoundsException ERROR

10 months ago

We have no control over the value returned by Serial.list(), except by fixing the hardware or the drivers...

fach2k9

Re: ArrayIndexOutofBoundsException ERROR

10 months ago

The reason I am using myPort = new Serial(this, Serial.list()[0], 9600); is because on one of the examples the code says that using that code any COM PORT when I plug my devices it ill take that new port and uses that one. In this case, I dont have to care about the port number and just write this code.

//From http://processing.org/reference/libraries/serial/Serial_available_.html

// Example by Tom Igoe

import processing.serial.*;

// The serial port:
Serial myPort;

void setup() {
  // List all the available serial ports:
  println(Serial.list());
  // Open the port you are using at the rate you want:
  myPort = new Serial(this, Serial.list()[0], 9600);
}

void draw() {
  while (myPort.available() > 0) {
    int inByte = myPort.read();
    println(inByte);
  }
}

Thanks to everyone !!

fach2k9

Re: ArrayIndexOutofBoundsException ERROR

10 months ago

I think I fixed it.

The reason is that line of code is only usable when any COM port is connected and is new.

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