Arduino write data - serial

Processing Electronics (Arduino, etc.)
4

This is my code

import processing.serial.*;
Serial myPort;
String aString = "HOMING_DONE";
String bString = "POSITION_REACHED_OK";
String testString;
String inPort;

void setup()
{
  println("Setup() is running........");
  println("Arduino found on Port: "+Serial.list());

  println("Serial Port Assigning Started........");
  myPort = new Serial(this , Serial.list()[0] , 115200);
  println("Serial Port Assigning Ended........OK");
 
  myPort.clear();
}

void draw() {
  
}

void serialEvent(Serial p) 
  {
  inPort = p.readStringUntil('\n');
  if(inPort != null) //this check is the key to making code in draw work
    {
    testString = inPort.trim();
    print(testString);  
    if(testString.equals(aString) == true)
      {
      println(" <-- COMMAND_FOUND_OK");
      // now send first line from txt file in format like  ( 0,0,0,0,0,100,100,500,500,0 )
      //myPort.write("0,0,0,0,0,100,100,500,500,0");
      //wait for bString = "POSITION_REACHED_OK" and then next line  ( repeat process until last line )
      }
    
    else if(testString.equals(bString) == true)
    {
      //problem is -> as soon I start code, this bString comes up ( I need to wait first for aString 
      // and then before sending each line need to wait for bString. 
    println(" <-- READY_TO_SEND");
    }
    
    else
    {
      println(" <-- CHECKING...");
    }
  }
}

and here is console output

Setup() is running…
Arduino found on Port: [Ljava.lang.String;@417b5e46
Serial Port Assigning Started…
Serial Port Assigning Ended…OK
POSITED_OK ← CHECKING…
POSITION_REACHED_OK ← READY_TO_SEND
HOMING_START ← CHECKING…
Z_HOME_OK ← CHECKING…
J3_HOME_OK ← CHECKING…
J2_HOME_OK ← CHECKING…
HOMING_DONE ← COMMAND_FOUND_OK
POSITION_REACHED_OK ← READY_TO_SEND
POSITION_REACHED_OK ← READY_TO_SEND
POSITION_REACHED_OK ← READY_TO_SEND
POSITION_REACHED_OK ← READY_TO_SEND
POSITION_REACHED_OK ← READY_TO_SEND
POSITION_REACHED_OK ← READY_TO_SEND

console