I am trying to send and receive 10 bit integers (the range of analogRead()) first from processing to Arduino and then arduino will reply back the same number to processing.
I am aware that Serial.write and Serial.read both send and receive 8 bit (1 Byte) values and I have that working. Now want to add 2 more bits to my Byte. I am sure I am not the first person to ask this.

The idea of bit-shifting is very interesting and I think it will solve my problem, however I need help on doing this; preferably an example code would be nice.
Or maybe help me build on top of the code I already have.

Thanks a bunch,

Processing

1. import processing.serial.*;
   Serial myPort;
   
   int inByte = 0;
   boolean proceed = false;
   boolean sending = true;
   
   void setup(){
     println(Serial.list());
     String portName = Serial.list()[0];
     // change [0] for the Arduino serial port
     myPort = new Serial(this, "COM5", 57600);
     myPort.clear();
    
   }
   
   void draw() {
     // first contact
     while (!proceed) {
       if ( myPort.available() > 0) {
         inByte = myPort.read();
         if (inByte == 'A') {
           println("Received " + inByte);
           myPort.clear();
           proceed = true;
         }
       }
     }
     // send and receive test
     while (proceed) {
       if (!sending) {
         if ( myPort.available() > 0) {
           inByte = myPort.read();
           println("Received " + inByte);
           myPort.clear();
           sending = true;
         }
       }
       if (sending){
         myPort.write(255);
         sending = false;
       }
     }
   }

Arduino

1. int inByte = 0;
   
   void setup() {
     // setup Serial comm with computer
     Serial.begin(57600);
     Serial.print('A'); // send letter "A"
   }
   
   void loop() {
     if (Serial.available() > 0) {
         inByte = Serial.read();
         Serial.write(inByte);
     }
   }
   

Hello,

I need to save incoming data from Arduino sent in this format at a serial speed of 57600:
The data are all int type.

1.     Serial.print(drive, DEC);
       Serial.print(" ");
       Serial.print(distanceAry[index], DEC);
       Serial.print(" ");
       Serial.print(pressureAry[index], DEC);
       Serial.print(" ");
       Serial.print(prSwitchAry[index], DEC);
       Serial.print(" ");
       Serial.println(tempAry[index], DEC);
   

Here is my processing program:

1. import processing.serial.*;
   PrintWriter output;
   Serial myPort;
   String myData = null;
   String[] Data = new String[5000];
   int numData = 0;
   int n = 0;
   int m = 0;
   
   
2. void setup() {
     println(Serial.list());
     String portName = Serial.list()[0];
     // change [0] for the Arduino serial port
     myPort = new Serial(this, "COM5", 57600);
     myPort.bufferUntil('\n'); // SerialEvent for new line
     myPort.clear();
     String Name = "Data "+str(month())+"-"+str(day())+"-"+str(year())
       +"_"+str(hour())+"."+str(minute())+".txt";
     // Create file to save the captured data
     output = createWriter(Name);
   }
   
   void draw() {
     while ( myPort.available () > 0 ) {
       myData = myPort.readStringUntil('\n');
       if ( myData != null ) {
         Data[n] = myData;
         n++;
       }
     }
     while ( myPort.available() <= 0) {
       if ( Data[m] != null) {
         output.print(Data[m]);
         m++;
       }
     }
   } 
3. void keyPressed() {
     output.flush(); // Writes the remaining data to the file
     output.close(); // Finishes the file
     exit(); // Stops the program
   }

The Arduino sends data when a push button is activated and it sends the data described above for 3.1 seconds. The data in the arrays was captured every 5 ms. (200Hz). The total number of data sequence is 620 rows and in each row there are 5 data.
Here is the problem I have:
First I run the processing program, then I press the push button. The TX light is on for a short time (~3.1 seconds).
Now my code says, if I press any key on keyboard, flush/close the file, and terminate the program, right?... This does not work, and I have to stop the program by clicking the Stop Button in the processing window.
Here is the weird thing: After I close the program, I only have 2.8 seconds of data in the output file. where did the other 300 ms go?
I really appreciate it if you can help me understand this, or you have some idea on how to fix this.
Thanks