Conditioning the sketch on finding the COM port trouble

Processing Electronics (Arduino, etc.)
6

I was saying I am getting a null pointer even when the Ardu was connected.

OK, I tried your code, but ‘success’ is not defined. Should we make a bool just for that?

Here

import processing.serial.*;
Serial myPort;
boolean isConnected = false;
int lf = 10; 

void setup() {
  size(1900, 950, JAVA2D);
  printArray(Serial.list());
  
}


void draw() { 
  background(0);

  if (isConnected == false) 
  {
    try {
      Serial myPort = new Serial(this, Serial.list()[0], 115200);
      myPort.clear();
      if (success) {
        isConnected = true;
      } else {
        delay (3000);
        println("NoPORT");
      }
    } 
    catch (Exception e) {
      delay (3000);
      println("NoPORT");
    }
  } else {
    if (myPort.available() > 0) {
      String IncomingSTR = myPort.readStringUntil(lf);
      println (IncomingSTR);
    }
  }
}