import processing.serial.*;
Serial com;
String input;
int r=0, g=0, b=0, x=0, y=0, z=0;

void setup()
{
  com=new Serial(this, "COM11", 9600);
}

void draw()
{
  //print(com.readString());
  background(r, g, b);
}


void serialEvent(Serial com)
{
  print(com.readString());
  //  input= com.readStringUntil(10);
  input = com.readStringUntil(10);

  String[] xyz = splitTokens(input, ",");

}





the following program is giving Null pointer exception while executing.

my serial input is
25,14,15
23,23,15
12,15,94
54,45,89
etc.