Error on my Processing GUI code for Arduino , I need some help

Processing Electronics (Arduino, etc.)
26

I’ve changed Ard code and Processing and I still have same error NullPointerException (line 46)

import processing.serial.*;


float winddir;
float windspeedmph;
float windgustmph;
float windgustdir;
float windspdmph_avg2m;
float winddir_avg2m;
float windgustmph_10m;
float windgustdir_10m;
float humidity;
float tempf;
float rainin;
float dailyrainin;
float pressure;
float batt_lvl;
float light_lvl;

String myString = null;
Serial myPort;





void setup()
{
size(700,700);
String portName = Serial.list()[5]; 
myPort = new Serial(this, portName, 9600);
myPort.clear();
myString = myPort.readStringUntil('\n');
myString = null;
}
void draw()
{
  while ( myPort.available() > 0) 
  {  
  myString = myPort.readStringUntil('!'); 
  if (myString != null) {
    println(myString);
    
    String myString = myPort.readString();
    
      String[] q = splitTokens(myString);
      
    
    
    
    
      winddir = parseFloat(q[0]);
      windspeedmph = parseFloat(q[1]);
      windgustmph = parseFloat(q[2]);
      windgustdir = parseFloat(q[3]);
      windspdmph_avg2m = parseFloat(q[4]);
      winddir_avg2m = parseFloat(q[5]);
      windgustmph_10m = parseFloat(q[6]);
      windgustdir_10m = parseFloat(q[7]);
      humidity = parseFloat(q[8]);
      tempf = parseFloat(q[9]);
      rainin = parseFloat(q[10]);
      dailyrainin = parseFloat(q[11]);
      pressure = parseFloat(q[12]);
      batt_lvl = parseFloat(q[13]);
      light_lvl = parseFloat(q[14]);

      
background(0);
textSize(20);
text("Wind direction:",50,50);
text(winddir,250,50);
text("Wind speed:" ,50,100);
text(windspeedmph,250,100);
text("Wind gust:",50,150);
text(windgustmph,250,150);
text("Wind gust direction:",50,200);
text(windgustdir,250,200);
text("Humidity:",50,250);
text(humidity,250,250);
text("Temperature",50,300);
text(tempf,250,300);
text("Rainfall:",50,350);
text(rainin,250,350);
text("Daily rain:",50,400);
text(dailyrainin,250,400);
text("Pressure",50,450);
text(pressure,250,450);
text("Battery level:",50,500);
text(batt_lvl,250,500);
text("Light level:",50,550);
text(light_lvl,250,550);

     
   }
  } 
}