Serial.read() gives null value from Arduino and or the port is not open on processing side

Processing Electronics (Arduino, etc.)
7 
/***************************************************************************
  This is a library for the BME280 humidity, temperature & pressure sensor

  Designed specifically to work with the Adafruit BME280 Breakout
  ----> http://www.adafruit.com/products/2650

  These sensors use I2C or SPI to communicate, 2 or 4 pins are required
  to interface. The device's I2C address is either 0x76 or 0x77.

  Adafruit invests time and resources providing this open source code,
  please support Adafruit andopen-source hardware by purchasing products
  from Adafruit!

  Written by Limor Fried & Kevin Townsend for Adafruit Industries.
  BSD license, all text above must be included in any redistribution
 ***************************************************************************/

#include <Wire.h>
#include <SPI.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

#define BME_SCK 13
#define BME_MISO 12
#define BME_MOSI 11
#define BME_CS 10

#define SEALEVELPRESSURE_HPA (1013.25)

Adafruit_BME280 bme; // I2C
//Adafruit_BME280 bme(BME_CS); // hardware SPI
//Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI

unsigned long delayTime;

void setup() {
  Serial.begin(9600);
//  Serial.println(F("BME280 test"));

  bool status;

  // default settings
  status = bme.begin();
  if (!status) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    while (1);
  }

  //Serial.println("-- Default Test --");
  delayTime = 1000;

  //Serial.println();

  delay(100); // let sensor boot up
}


void loop() {
  printValues();
  delay(delayTime);
}


void printValues() {
//  Serial.print("Temperature = ");
  Serial.println(float(bme.readTemperature()));
//  Serial.println(" ");
//
//  Serial.print("Pressure = ");
//  Serial.print(bme.readPressure() / 100.0F);
//  Serial.println(" hPa");
//
//  Serial.print("Approx. Altitude = ");
//  Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
//  Serial.println(" m");
//
//  Serial.print("Humidity = ");
//  Serial.print(bme.readHumidity());
//  Serial.println(" %");
//
//  Serial.println();
}

There’s the Arduino code. Its just example code for the sensor I’m using with some of the println’s commented out so I could get one thing working at a time and then include all the println’s later or change how they are presented to processing.

The baudrate in processing and Arduino are the same (9600) and I always close the serial monitor in Arduino before running the processing code. Processing stops responding and Arduino says the port is in use if I try running one while the other is already open.
The correct data comes through on serial monitor, but processing gives either -1’s or null.