For the moment I'm troubled with the ascii convertion and saving the output of the console log.

I've used the createWriter() to log the console to a file. This only stops after hitting a key.

How could I turn this into a daily or maybe hourly 'save to file' happening. So I have multiple files with shorter amounts of code in it?

What do I need to do to make this work?

Thanks in advance.

code:

import processing.video.*;
Movie mov;
String fileName;

void setup() {
  size(800, 800);
}  

void draw() {
}

void keyPressed() {
  if (key == 'p') selectInput("Select movie:", "movieSelected");
}

void movieSelected(File selection) { 
  if (selection == null) {
    println("Window was closed or the user hit cancel.");
  } else {
    fileName = selection.getAbsolutePath();
    mov = new Movie(this, fileName);

    String[] processCommands = {
      "E:/Tertiary/COMP390/Movie Second/ffmpeg/bin/ffmpeg.exe", 
      "ffmpeg", "-i", "mov", "-codec:a", "libmp3lame", "-qscale:a 2", "fileName" + "output.mp3"
    };
    Process p = launch(processCommands);

    try {
      int result = p.waitFor();
      println("the process returned " + result);
    } 
    catch (InterruptedException e) {
    }
  }
}

It will not compile, repeatedly giving me two of these errors:

check = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE); ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Manifest.permission.READ_EXTERNAL_STORAGE cannot be resolved

I have both READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE enabled properly.

Anyone experience this before?

My goal is to collect several trials with x and y coordinates and export them in separate data files 9one for each trial). i am using PrintWirter

PrintWriter[] output = new PrintWriter[4];

in this case it created 5 output files where i can save my data, and then i would like to fill them with the x and y positions.

The files are correctly created, but they contain the same data, i.e. file number 1 contain the same x and y data of the file number 5.

here the code

void setup(){
smooth();
fullScreen();
rectMode(CENTER);
//define the output file where you want to save it
for (int i =0; i <output.length; i++){
output[i] = createWriter("/Users/Dropbox/ProcessingData/positions" + nfs(i,2) + ".txt");
}
//define the sampling frequency
frameRate(200);
}

here the part of the code with x and y coordinates

 if(mousePressed){
      for (int i =0; i <output.length; i++){
 output[i].println(mouseY + "\t" +mouseX);
 }

and this is the part where i save the data

for (int i =0; i <output.length; i++){
output[i].flush();
output[i].close();
}

any help is appreciated.

Thanks

Ivan

Also i only want to print the first 10 lines of the txt file in the console when i press the ENTER key. But if the file contains only 3 lines i get an ArrayIndexOutOfBoundsException. How do i stop this from happening?

PrintWriter history;

void setup() {
  size(700, 350);
  history = createWriter("history.txt");
}

void draw() {
}

void keyPressed() {
  if ((key=='1')) { 
    history.println("User pressed 1");
  }

  if ((key=='2')) { 
    history.println("User pressed 2");
  }

  if ((key == ENTER)) {
    history.flush(); 
    history.close();
    String[] history = loadStrings("history.txt");
    for (int i = 0; i <= 9; i++) { //only print first 10 lines
        printArray("[" + i + "] " + history[i]);
    }
  }
}

Any help will be appreciated :)

import peasy.*;
import saito.objloader.*;
import spout.*;

//PrintWriter output;
OBJModel model ;
OBJModel Smodel ;
OBJModel tmpmodel ;

Spout spout;


PeasyCam cam;

float z=0;
float easing = 0.005;
float r;
float k;
int VertCount;
PVector[] Verts;
PVector[] locas;
PVector Mouse;
PVector Mouse2;

int VECS = 600;


void setup()
{
  size(800, 800, P3D);
  frameRate(30);
  noStroke();

  model = new OBJModel(this, "Model2.obj", "absolute", TRIANGLES);
  model.enableDebug();
  model.scale(200);
  model.translateToCenter();


  Smodel = new OBJModel(this, "Model2.obj", "absolute", TRIANGLES);
  Smodel.enableDebug();
  Smodel.scale(200);
  Smodel.translateToCenter();


  tmpmodel = new OBJModel(this, "Model2.obj", "absolute", TRIANGLES);
  tmpmodel.enableDebug();
  tmpmodel.scale(200);
  tmpmodel.translateToCenter();

  //output = createWriter("positions.txt"); 

  cam = new PeasyCam(this, width/2, height/2, 0, 1600);

  spout = new Spout(this);

  spout.createSender("Self");
}



void draw()
{
  background(0);
  lights();



  int VertCount = model.getVertexCount ();
  Verts = new PVector[VertCount];
  locas = new PVector[VertCount];
  r =100;
  k = k + 0.01;


PVector psVerts[] = new PVector[VECS];
PVector psVerts2[]= new PVector[VECS];


  cam.setMouseControlled(false);


  Mouse = new PVector(mouseX-width/2, mouseY-height/2, z);
  Mouse2 = new PVector(width/2 -height/2, z);





  //println(frameCount);
  pushMatrix();




  translate(width/2, height/2, 0);
  rotateY(k);


  for (int i = 0; i < VertCount; i++) {
    //PVector orgv = model.getVertex(i);

    locas[i]= model.getVertex(i);
    Verts[i]= Smodel.getVertex(i);


    //PVector tmpv = new PVector();


    if (frameCount> 100) {



      float randX = noise(randomGaussian());
      float randY = noise(randomGaussian());
      float randZ = noise(randomGaussian());

      PVector Ran = new PVector(randX, randY, randZ);

      //float norX = abs(cos(k)) * randX;
      //float norY = abs(cos(k)) * randY;
      //float norZ = abs(cos(k)) * randZ;









      if ((Verts[i].y > Mouse.y  - r/2 && Verts[i].y < Mouse.y  + r/2 && Verts[i].x > Mouse.x  - r/2 && Verts[i].x < Mouse.x  + r/2 && Verts[i].z > Mouse.z  - 1920/2 && Verts[i].z <  Mouse.z  + 1920/2)||(Verts[i].y > Mouse2.y  - r/2 && Verts[i].y < Mouse2.y  + r/2 && Verts[i].x > Mouse2.x  - r/2 && Verts[i].x < Mouse2.x  + r/2 && Verts[i].z > Mouse2.z  - 1920/2 && Verts[i].z <  Mouse2.z  + 1920/2)) {
        tmpmodel.setVertex(i, locas[i].x, locas[i].y, locas[i].z);
      } else {   



        Verts[i].x+=Ran.x;
        Verts[i].y+=Ran.y;
        Verts[i].z+=Ran.z;

        if (Verts[i].x > width/2 ) {
          Verts[i].x=-width/2;
        } else if (Verts[i].x < -width/2) {
          Verts[i].x=width/2;
        }
        if (Verts[i].y > height/2 ) {
          Verts[i].y=-height/2;
        } else if (Verts[i].y < -height/2) {
          Verts[i].y=height/2;
        }

        if (Verts[i].z < -800/2 ) {  
          Verts[i].z=800/2;
        } else if ( Verts[i].z > 800/2) {
          Verts[i].z=-800/2;
        }
        tmpmodel.setVertex(i, Verts[i].x, Verts[i].y, Verts[i].z);
      }
    }
    // output.println("Verts " + Verts[i] + " locas " +locas[i]);
  }

  pushMatrix();
  rotateY(-k); //-----------------HERE
  //translate(0, 0, 0);
  //rotateY(k); //
  fill(26, 59, 45);
  noStroke();
  beginShape();

  for (int i=0; i < VECS; i+=30 ) {

    psVerts[i] = new PVector (Mouse.x, Mouse.y,Mouse.z);
   psVerts2[i] = new PVector(Mouse2.x, Mouse2.y,Mouse2.z);



  vertex(psVerts[i].x, psVerts[i].y, psVerts[i].z);
  vertex(psVerts2[i].x, psVerts2[i].y, psVerts2[i].z);
  vertex(noise(-width/2,+width/2),noise(-height/2,+height/2),noise(-width/2,+width/2));
  }
  endShape();
  popMatrix();


  pushMatrix();
  rotateY(-k); //-----------------HERE

  translate(Mouse.x, Mouse.y, Mouse2.z+width/2);
  rotateY(k); //-------------AND HERE

  fill(255, 0, 0);

  ellipse(0, 0, 10, 10);
  popMatrix();




  pushMatrix();
  rotateY(-k); //-----------------HERE
  fill(255, 0, 0);
  translate(Mouse2.x, Mouse2.y, Mouse2.z+width/2);
  rotateY(k); //-------------AND HERE


  ellipse(0, 0, 10, 10);
  popMatrix();


  noStroke();

  tmpmodel.draw();

  popMatrix();



  pushMatrix();
  translate(width/2, height/2, 0);
  rotateY(k);
  noFill();

  stroke(255);
  strokeWeight(7);
  box(width, height, 800);
  popMatrix();
  //output.flush(); // Writes the remaining data to the file
  //output.close(); // Finishes the file
  //saveFrame();
  println(z);

  spout.sendTexture();
}

void keyPressed() {
  if (keyCode == UP) {
    z++;
  }
  if (keyCode == DOWN) {
    z--;
  }
}

import processing.serial.*;

PrintWriter output;
Serial portGenerator;  // Arduino Uno, Controlling and recording generator
String valueGenerator;
String fileName;
String timestamp;
String timer;
StopWatchTimer sw;

void setup()
{
  println(Serial.list());
  println("Generator Control");
  print("Setting up Serial ports... ");
  portGenerator = new Serial(this, "COM3", 9600);  // intialising serial to Arduino Uno
  println("Done");

  fileName = year() + nf(month(),2) + nf(day(),2) + "-" + nf(hour(),2) + nf(minute(),2) + nf(second(),2) + "_test.csv";
  sw = new StopWatchTimer();
  output = createWriter(fileName); 
  sw.start();
}

void draw()
{
  while (portGenerator.available() > 0) // only when there are bytes available
  {
    valueGenerator = portGenerator.readStringUntil('\n'); // read line until \n
    timer = nf(sw.elapsedTime(), 6);
    if (valueGenerator != null)
    {
      output.print(timer);
      output.print(", ");
      output.print(valueGenerator);

      print(timer);
      print(", ");
      print(valueGenerator);
    }
  }
}

class StopWatchTimer
{
  int startTime = 0;
  int stopTime = 0;
  boolean running = false;

  void start()
  {
    startTime = millis();
    running = true;
  }

  void stop()
  {
    stopTime = millis();
    running = false;
  }

  int elapsedTime()
  {
    int elapsed;
    int elapsedSecond;
    if (running)
    {
      elapsed = (millis() - startTime);
    } else {
      elapsed = (stopTime - startTime);
    }

    elapsedSecond = (elapsed/1000);
    return elapsedSecond;
  }
}

void keyPressed()
{
  sw.stop();
  output.flush(); // Writes the remaining data to the file
  output.close(); // Finishes the file
  exit();         // Stops the program
}

AbsolutePath = selection.getAbsolutePath();
println("new Folder = " + AbsolutePath ); fileoutput = createWriter( AbsolutePath + ADC" +str(month())+"-"+str(day())+"-"+str(year())+"_"+str(hour())+"."+str(minute())+"."+str(second())+".txt");

`import processing.serial.*; PrintWriter writer;

Serial myPort; // The serial port int xPos = 0; // horizontal position of the graph float inByte = 0; int lastxPos = 1; int lastHeight = 0;

void setup () { // set the window size: size(800,600);

// List all the available serial ports // if using Processing 2.1 or later, use Serial.printArray() println(Serial.list());

// I know that the first port in the serial list on my mac // is always my Arduino, so I open Serial.list()[0]. // Open whatever port is the one you're using. myPort = new Serial(this, "COM3", 115200);

// don't generate a serialEvent() unless you get a newline character: myPort.bufferUntil('\n');

//writer = createWriter("new_data.txt"); // set inital background: background(0); } void draw () { // draw the line: stroke(255,255,255); strokeWeight(1); //delay(5); line(lastxPos, lastHeight, xPos, height - inByte); lastxPos = xPos; lastHeight = int(height - inByte); if (xPos >= width) { xPos = 0; lastxPos = 0; background(0); } else { // increment the horizontal position: xPos++; }

}

void serialEvent (Serial myPort) { // get the ASCII string: if(myPort.available() > 0){ String inString = myPort.readStringUntil('\n');

if (inString != null) { // trim off any whitespace:

inString = trim(inString);
// convert to an int and map to the screen height:
inByte = float(inString);
//println(inByte);    
inByte = constrain(inByte, 0, 32768);
println(inByte/16384.0);
inByte = map(inByte, 0, 32768, 0, height);

}

} }`

//Ler os dados da porta serial e salvar num arquivo .txt

import processing.serial.*;
import cc.arduino.*;

Serial portaCOM5; //Cria um objeto da classe Serial
String dados, COM5; //Dados em ASCII recebidos do Arduino
int val ;// Dados recebidos pela porta serial

//Banco de dados
PrintWriter arquivo; 

void setup ()
{
  size (200, 200);
  frameRate(10);   
  
     
   println(Serial.list ()); //Lista no Prompt de Comando todas as portas seriais disponíveis
   
   COM5 = Serial.list()[0]; //Recebe a porta USB escolhida
   portaCOM5= new Serial(this, "COM5", 9600); //taxa de transfarencia 9600bps
   portaCOM5.bufferUntil('\n');
      
        //Banco de dados:
   arquivo = createWriter("temperaturas"+"_"+month()+"-"+day()+"-"+year()+"_"+hour()+"-"+minute()+"-"+
            second()+".txt"); //cria um arquivo para armazenar as temperaturas
    
    arquivo.print("Monitoramento de Temperatura DHT11");
    arquivo.println();    
  
}

void draw()
{
  background (255); //Ajusta cor de fundo como branca
  
  }
   
void serialEvent(Serial portaCOM5)
{
  
     COM5= Serial.list()[0]; //Recebe a porta USB escolhida
       
      
  while (portaCOM5.available()>0)
  {
     val = portaCOM5.readString();
     arquivo.println();
  }
         
  arquivo.flush(); // Writes the remaining data to the file
  arquivo.close(); // Finishes the file
         
}

PS: When I check the monitor serial from Arduino, the data are there, so I believe anything here is wrong.

Thanks!!!!

I have a huge text file with millions of point. (x,y,z). I need to transfer the data between two different software. But the format is not same as I need. (of course'' :-) ) I have a short code to change the file line by line. It works with approx.: 1 million point well. But if I want to test the final version, stucks somewhere. How I need to change the code to handle the huge file? The machine time is not important, but I need to be sure the code is running. (A chance of proper interrupt option to the code would be great. (ex.: close the file properly after the press a specific key) Thank you in advance.

` output = createWriter("result.txt"); }

void draw(){ String[] ln= loadStrings("liftgate test_tab.txt");
String[] content1 = new String[2]; String content2; int progress;

//for (int i=0; i < (ln.length-1) ;i++){ for (int i=1; i < (100) ;i++){ content1 =split(ln[i],","); content2=join(content1,"\t"); progress=(i); output.print(content2); output.print("\n"); println(progress);

} output.flush(); // Writes the remaining data to the file output.close(); // Finishes the file println("vege"); noLoop(); } `

Thanks!

Aunque he estudiado programación en PASCAL hace ya algún tiempo, mis conocimientos de programación están bastante obsoletos, por lo cual el contacto con el JAVA y PROCESSING me está costando mucho trabajo.

Estudiando un poco por aquí y por allí he logrado hacer un código para un programa, pero me da problemas. Y quisiera preguntar si alguno puede ayudarme en este proyecto, que imagino para algunos será relativamente fácil.

El código que he logrado hacer es el siguiente:

import processing.serial.*; //Importamos la librería Serial

Serial port; //Nombre del puerto serie

PrintWriter output; //Para crear el archivo de texto donde guardar los datos

float valorP;//Valor de la presión
float valorH;//Valor de la humedad relativa float valorT;//Valor de la Temperatura int index=0;

{ println(Serial.list()); //Visualiza los puertos serie disponibles en la consola de abajo port = new Serial(this, Serial.list()[1], 9600); //Abre el puerto serie COM3

output = createWriter("Parametros_datos.txt"); //Creamos el archivo de texto, que es guardado en la carpeta del programa

size(800, 400); //Creamos una ventana de 800 píxeles de anchura por 600 píxeles de altura }

void setup() { port.write("p"); //Envia una "p" para que el Arduino lea la presión }

{ //Recibir datos presión del Arduino if(port.available() > 0) // si hay algún dato disponible en el puerto { valorP=port.read();//Lee el dato y lo almacena en la variable "valorP" }

//Visualizamos la presión con un texto text("Presión =",390,200); text(valorP, 520, 200); text(" hPa",547,200);

//Escribimos los datos de la presión con el tiempo (h/m/s) en el archivo de texto output.print(valorP + " hPa "); output.print(hour( )+":"); output.print(minute( )+":"); output.println(second( )); output.println("");

}

{ port.write("h"); //Envia una "h" para que el Arduino lea la humedad y la temperatura

}

void draw()

{ //Recibir datos de Temperatura y Humedad del Arduino if(port.available() > 0) // si hay algún dato disponible en el puerto

{

//Leemos hasta que se encuentre un espacio y guardamos lo leido en Data Data = port.readStringUntil(" "); //buscamos la posición del espacio que separa //los dos valores y guardamos la posición en index index = Data.indexOf(" ");

//almacenamos la primera parte del texto en valorH valorH= Data.substring(0,index); //Almacenamos la segunda parte en valorT valorT= Data.substring(index+1,Data.length()); } } { valor=port.read();//Lee el dato y lo almacena en la variable "valorH" } //Visualizamos la humedad y la temperatura con un texto text("Humedad = ", 390, 300); [color=green] text(valorH, 520, 300); text(" % ", 547, 300); text("Temperatura = ", 630, 300); text(valorT, 520, 547); text(" ºC ", 547, 300);[/color] } { //Escribimos los datos de la temperatura y la humedad con el tiempo (h/m/s) en el archivo de texto output.print(valorHT + " % ºC "); output.print(hour( )+":"); output.print(minute( )+":"); output.println(second( )); output.println("");

}

void keyPressed() //Cuando se pulsa una tecla {

} { //Pulsar la tecla E para salir del programa if(key=='e' || key=='E')

{ output.flush(); // Escribe los datos restantes en el archivo output.close(); // Final del archivo exit();//Salimos del programa } }

Pero no se si está bien porque me da varios errores. Si alguien pudiese echar un vistazo a ver qué está mal, me sería de gran ayuda. Muchas gracias.

Here is the Code, you may need an Arduino sending println Strings to execute it

import processing.serial.*;
Serial myPort;       
int xPos = 1;         
float inByte = 0;
float printValue = 0;
PrintWriter output;
int d  =  day();    
int m  =  month();
int y  =  year();   
int h  =  hour();
int mi =  minute();
int value = 0;
int number = 55;
int axis = 0;
int incree = 1;
int increeax = 14;
String Tag     = str(d);
String Monat   = str(m);
String Jahr    = str(y);
String Stunde  = str(h);
String Minute  = str(mi);
String End     = (".txt");
String textValue = "";
void setup () {
fullScreen(); 
String[] Date = new String[6] ;
Date[0] = Tag   ;
Date[1] = Monat ;
Date[2] = Jahr  ; 
Date[3] = Stunde;
Date[4] = Minute;
Date[5] = End;
String DateData = join(Date, ",");
output = createWriter(DateData); 
printArray(Serial.list());
   
   myPort = new Serial(this, Serial.list()[0], 9600);
   myPort.bufferUntil('\n');
   
   background(0);
  
  }
void draw () {
  
  stroke(250, 0, 0);
  line(xPos, height, xPos, height - inByte);
  
  for (int i = 0; i < 1370; i = i+14) {
       stroke(#FFFFFF);
       line(0, i, width, i); 
       textSize(15);
       text(number, 10, axis);
       number -= incree;
       axis += increeax;
      }
      
  output.println(printValue +" mBar" ); 
  printValue = map(inByte, 0, 1023, 0, 10);       //auf pressure ummappen, noch formel einsetzen
  fill(0);
  noStroke();
  rect(0, 0, width, 30);
  fill(#FFFFFF);
  text("Pressure:  " + printValue    + "     mBar", width -600, 25); 
  text("Pirani gauge pressure Analyzer Ver. 1.2  Copyright 2016 L.Ponzio", width - 1300, 25);
  text("Time: " + millis()+ " mSec", width -775, 25);
  text("mBar", width-1350, 25);
  
  if (xPos >= width) {
    xPos = 30;
    background(0);
     } else {
       xPos++;
      }
 }
void serialEvent (Serial myPort) {
  // get the ASCII string:
  String inString = myPort.readStringUntil('\n');

  if (inString != null) {
    // trim off any whitespace:
    inString = trim(inString);
    // convert to an int and map to the screen height:
    inByte = float(inString);
   // println(inByte);
    inByte = map(inByte, 0, 1023, 0, height);
  }
}
void keyPressed() {
  output.flush();  
  output.close();  
  exit();  
}

`

still working on the string save function and open function.

got this from stackoverflow works to save file to Android internal storage SDCARD.

import android.os.Environment; // need this for Environment Android stuff

public void SaveFile() {

try { String filename="visualiser.txt"; String directory = new String(Environment.getExternalStorageDirectory().getAbsolutePath() ); save(directory + "/" + filename); } catch (Exception e) {

} }

just call SaveFile(); or what ever you want to call it... you will need to set sketch permissions to WRITE_EXTERNAL_STORAGE for file io.

anyone know of a simple method to read write load file into a string.

seen a few methods but it seems overly complicated. createbuffer writebuffer etc.

im no expert in android or java so dont ask me how this works. but its sort of easy to follow. ( declare name/find path/savefile/catch error etc).

Basically i want to save my Highscore in a Snake game.

But if I start a new game my Highscore stays always at 10! even if i reset it or in my txt file stands other staff like 39.

Here my Code

 updateHighscore(){
  if(highscore < s.score){
     highscore = s.score;
     
     //Create a new file in the sketch directory
     output = createWriter(highscoreDatei);
     output.println(highscore);
     output.close(); // Writes the remaining data to the file & Finishes the file
  }
}

 importHighscore(){
// Open the file from the createWriter()

reader = createReader(highscoreDatei);
    if(reader==null){ 
    highscore = 0;
    return;
  }
String zeile;
try{
  zeile = reader.>readLine();
}catch (IOException e){
  e.printStackTrace();
  zeile = null;
}
if(zeile != null){
  highscore = int(zeile);
  //println(highscore)
}
  try{
    reader.close();
  }catch (IOException e){
    e.printStackTrace();
  }
}

importHighscore() is in the setup function and updateHighscore() is in my gameOver() function. Btw the updateHighscore() function works well, the txt gets always updated.

Hope anyone can help me. Thanks

BufferedReader RootDIRcontentExtractor;
PrintWriter DIR_Line_Extracted_Output;
int n=1;
String[] Ext=new String[2];
long[] NumberOfFilesofExt;
Boolean[] UserPressedButton;
long[] Number_of_inner_directories;
int k;
String line;
StringList[] LineIndexed;
String[] pieces=new String[100];
void setup(){
size(1200,1200);

Ext[0]="exe";
Ext[1]="txt";
RootDIRcontentExtractor=createReader("C:/Users/Adam/Desktop/MAIN/LEVEL1/ROOT_DIR_LEVEL1_NAMES.txt");  
DIR_Line_Extracted_Output=createWriter("C:/Users/Adam/Desktop/MAIN/output1.txt");

}

void draw(){

 try {




    line= RootDIRcontentExtractor.readLine();
    LineHasText(line);
  } catch (IOException e) {
    e.printStackTrace();
    line = null;
  }
  if (line == null) {
    exit(); 
  } else {
   for(int j=0;j<=line.length();j++){ 

    pieces = split(line," ");
    n=pieces.length;   
   for(int i=0;i<=n-1;i++){  
   LineIndexed[j].append(pieces[i]);


    DIR_Line_Extracted_Output.println(LineIndexed[j]);
   }
   }
  }

}

this output was:

i will have a go in cmd,exe in evevalted mode and try assigning a label to the C drive, there isnt any harm in me doing this, right? i mean i can only assume that its mentioned in the verbose because its related, learning how to do all this stuff is already mind rapey at 32, it would be pure evil if they just threw unrelated commentary into the output so yea its safe to assume it wants me to label the drive, although im still not entirely clear on what that means. right?

Any idea? Also, any idea if it's possible for me to no wait the fisrt 8 seconds.

Thanks

                import processing.serial.*;
                PrintWriter output;

                Serial myPort;  // The serial port

                void setup() {

                  output = createWriter("andyPiezoBuzzerADXL335.txt");
                  // Open whatever port is the one you're using.
                  myPort = new Serial(this, "COM4", 9600);
                }

                void draw()
                {
                  while (myPort.available () > 0) {
                    String inBuffer = myPort.readString();   
                    if (inBuffer != null) {  // != not equal
                      output.println(inBuffer);
                      delay(3000);
                    }
                  }


                  output.flush(); // Write the remaining data

                  output.close(); // Finish the file

                    exit(); // Stop the program
                } 

class Score {
  PrintWriter writer;
  String[] reader = loadStrings("scores.txt");
  int data;
  int data2;
  int data3;

  Score() {
    data  = 0;
    data2 = 0;
    data3 = 0;
  }
  Score(int receiver, int receiver2, int receiver3) {
    data  = receiver;
    data2 = receiver2;
    data3 = receiver3;
  }

  void write() {
    int[] collection = {data, data2, data3};
    writer = createWriter("scores.txt");
    for (int i = 0; i < collection.length; i++)
    writer.println(collection[i]);
    writer.flush();
    writer.close();
  }

    int read() {
    int piece = 0;
    piece  = int(reader[0]);
    return piece;
  }
    int read2() {
    int piece2 = 0;
    piece2 = int(reader[1]);
    return piece2;
  }
    int read3() {
    int piece3 = 0;
    piece3 = int(reader[2]);
    return piece3;
  }
}// End Class

Is Processing keeping that file open somehow while the sketch is running? Is there any way I can get around this problem?

    import processing.serial.*; 

    PrintWriter output;
    Serial myPort;    // The serial port
    PFont myFont;     // The display font
    String inString;  // Input string from serial port
    int lf = 10;      // ASCII linefeed 
    char uno = ' '; //To compare data
    boolean hay_puerto = false; //True if there are ports on the list

    void setup() 
    { 
      size(400, 200); 
      output = createWriter("data.txt"); //Create txt file
      noLoop();
`//To know if there is a port `
      String[] s  = Serial.list();
      println(s.length);
      if (s.length!=0)
      {
        hay_puerto = true;
      } else
      {
        hay_puerto = false;
      }

`//If there is a port, start connection`
      if (hay_puerto)
      {
        myPort = new Serial(this, Serial.list()[0], 9600); 
        myPort.bufferUntil(lf);
      } else
      {
        println("No serial port connected");
      }
    } 

    void draw() 
    { 
      background(0); 
      text("received: " + inString, 10, 50);
    } 

    void serialEvent(Serial p) 
    {
      uno = myPort.readChar();
      if (uno == '$')
      {
        inString = myPort.readString();

        if (inString != null) 
        {
          println(inString);
          output.println(inString);
        }
      } else
      {
        myPort.clear();
      }
      //inString = p.readString();
      redraw();
    }

    void keyPressed()
    {
      if (key=='x')
      {
        output.flush();  //writes data in the file
        output.close();  //Closes document
        exit();
      }
    }

My question is: Is there another way to know if the port is available? I mean, in my code I check for the size of the port list, and if it is zero it means that there is no port. If I don't do this, the program gets an error because there is no port. The problem is happen when I connect the port (while running the program), my program does not detect it so it does not do anything when I send something.

I hope my question is clear, and thanks :).

As seen in SaveFile2 in the example, you can save a file with PrintWriter like:

PrintWriter output = createWriter("log.txt"); output.println("This is a log"); output.flush(); output.close();

However, log.txt will be overwritten when you run this code twice. Does anyone know how to "append" text to a file?

Best..Yui

doesn't work... i am not sure why... I am trying to get it to print 10 zeros and then flush puts all of the info into the file, what am i doing wrong

I'm viewing serial data from Arduino (it will be plotted but isn't here to make the example simpler). I only want to record when something interesting is happening. Record is triggered with a mouse click on a button from Processing. The following code works great. BUT, I can only record one snippet of the data stream.

import processing.serial.*; 

Serial myPort;    // The serial port
int mills; 
String dataOutput;
int val;
int value;
PrintWriter output;

int rectX = 50; //button coords
int rectY = 400;
int rectW = 100;
int rectH = 50;
String command = "";
boolean canStart = true;
String timestamp;

void setup() { 
  size(1500, 480);
  println(Serial.list()); 
  myPort = new Serial(this, Serial.list()[2], 9600); 
  //output = createWriter("test.txt");
  //myPort.bufferUntil(lf); 
  //output = createWriter(timestamp + ".txt");
  timestamp = year() + nf(month(),2) + nf(day(),2) + "-"  + nf(hour(),2) + nf(minute(),2)+ nf(second(),2);
  output = createWriter(timestamp + ".txt");
} 
int getValue() {
  int value = -1;
  while (myPort.available () >= 3) {
    if (myPort.read() == 0xff) {
      value = (myPort.read() << 8) | (myPort.read());
    }
  }
  return value;
}
void draw() {
  background(0);

  if (canStart) {
    command = "REC";
    fill(0, 255, 0);
  } else {
    saveData();
    command = "STOP";
    fill(255, 0, 0);
  }
  noStroke();
  rect(rectX, rectY, rectW, rectH);
  fill(255);
  text(command, rectX + 30, rectY + 30);  
 }

void mousePressed() {
    if(buttonOver()){
   if(canStart){
    } else {
    output.flush(); // Writes the remaining data to the file
    output.close(); // Finishes the file
    PrintWriter output;
    }
     canStart = !canStart;
  }
}

boolean buttonOver()  {
  if (mouseX >= rectX && mouseX <= rectX+rectW && 
      mouseY >= rectY && mouseY <= rectY+rectH) {
    return true;
  } else {
    return false;
  }
}

void saveData(){
  val = getValue();
  mills= millis();
  String[] dataOutput = {val + "," + mills};
  println(dataOutput); 
  output.println(val + "," + mills); // Write the coordinate to the file 
}

I really need a new createWriter to make a new file each time the button is pressed. So I tried the following:

void saveData(){
  timestamp = year() + nf(month(),2) + nf(day(),2) + "-"  + nf(hour(),2) + nf(minute(),2)+ nf(second(),2);
  output = createWriter(timestamp + ".txt");
  val = getValue();
  mills= millis();
  String[] dataOutput = {val + "," + mills};
  println(dataOutput); 
  output.println(val + "," + mills); // Write the coordinate to the file 
}

This continually creates empty files, and doesn't get me where I want to be.

import processing.serial.*;

PrintWriter output;

Serial myPort;

void setup()

{

output= createWriter("data.txt");

myPort=new Serial(this,"COM1",9600);

}

void draw()

{

if(myPort.available()>0)

 {


   String rfid=myPort.readString();


     if(rfid!=null)


         {


           trim(rfid); 


           output.println(rfid); println(rfid);


           logger.println(rfid);


           logger.println(" ");


                     output.flush();


                     output.close();



         }


 }

}

void keyPressed()

{

logger.flush();

logger.close();

exit();

}

My issue (first of many presumably) is when saving the individual .txt files which are a record of each user's input, I want the filename to contain the timestamp.

I've used textFile = textFile = createWriter(timestamp()+".txt"); as a placeholder for the moment, but this obviously isn't a 'thing'...

This is what I have so far (Code adapted from examples by Amnon available here: https://amnonp5.wordpress.com/2012/01/28/25-life-saving-tips-for-processing/ and Daniel Shiffman available here: http://www.learningprocessing.com/examples/chapter-18/example-18-1/:):

    String myText = "Give me your story.";
    String yourText = ""; // Variable to store text currently being typed
    String savedText = ""; // Variable to store saved text when control is hit
    PrintWriter textFile;

    void setup() {
      size(500, 500);
      textAlign(CENTER, CENTER);
      textSize(30);
      fill(0);
      // Create a new file in the sketch directory
      textFile = createWriter(timestamp()+".txt");
    }

    void draw() {
      background(255);
      text(myText, 0, 0, width, height);
      text(yourText, 0, 0, width, height);
      text(savedText, 0, 0, width, height);
    {
      textFile.println(savedText);
      textFile.flush();
      textFile.close();
     } 
      }

    void keyPressed() {
      if (keyCode == ENTER) {
        myText="";}
      if (keyCode == BACKSPACE) {
        if (yourText.length() > 0) {
          yourText = yourText.substring(0, yourText.length()-1);
      }
      } 
      else if (keyCode == DELETE) {
        yourText = "";
      } 
      else if (keyCode != SHIFT && keyCode != CONTROL && keyCode != ALT) {
        yourText = yourText + key;
      }
        // If the Control key is pressed, save the String and clear it
      if (key == CODED) 
      {
        if (keyCode == CONTROL) {
        savedText = yourText;
        // Text is cleared
        yourText = ""; 
      } else {
        // Otherwise, concatenate the String
        // Each character typed by the user is added to the end of the String variable.
        yourText = yourText + key; 
      }
    }
    }

As you can tell I am brand-new to code and what's above is not an elegant piece of code (and probably making your eyes bleed). If you have any suggestions for making it better, or a better alternative than timestamp for naming the multiple .txt files, please let me know. Thanks in advance.

import processing.serial.*; PrintWriter output;

Serial myPort; void setup() { output= createWriter("data.txt"); myPort=new Serial(this,"COM1",9600); } void draw() { while(myPort.available()>0) { String rfid=myPort.readString(); if(rfid!=null) { output.println(rfid); } } } void keyPressed() { output.flush(); output.close(); exit(); }

  //records where data is being saved to
    print("saving " + save_name +" to ..//programming_year1//io");

    //I will create a printWriter object for writing text to a file, this
    //will save me from having to first a String array as I would with 'saveStrings()'
    PrintWriter out = createWriter(save_name+".txt");

But its annoying that it doesn't save into a file I have stored in the sketch dorectory called 'io'

// general function of appending  a new line of text to an existing text file
void appendNewLine (String _fileName, String _newLine) {
  // http://forum.processing.org/two/discussion/comment/33698

  // method B:
  // text file can be put in any folder relative to the sketch folder

  String[] lines = loadStrings(_fileName);

  // create a copy of the existing file
  PrintWriter output = createWriter(_fileName);

  // write the contents of the existing file to the new one
  for (int i = 0; i < lines.length; i++) {
    output.println(lines[i]); 
  }

  // append new contents to the new file
  //output.println("\n"); 

  output.println(_newLine);
  //output.flush(); // might be redundant
  output.close();
}

Thanks!