thanks to all,

pls help, i wanna do 2 things here

1. wanna create output file hate, hate2, hate3 until hate 6. output entension text format.

2. got error ( red word )

pls help ..

import processing.serial.*;

PrintWriter output;

Serial arduinoPort;
int like = 0;
int hate = 0;

void setup() {
  arduinoPort = new Serial(this, Serial.list()[0], 9600);
  output = createWriter("counter.txt");
  output.println(day()+ "/" + month()+"/"+year());
  size(800, 600);
  fill(0,0,0);
  textSize(14);
  text ("friends 1", 100, 230);
  text ("friends 2", 120, 230);
  text ("friends 3", 130, 230);
  text ("friends 4", 140, 230);
  text ("friends 5", 150, 230);
  text ("friends 6", 160, 230);
  fill(256, 256, 256);
  rect(100, 250, 100, 100);
  fill(256,0,0);
  rect(500,500,50,50);
}

void draw() {
  byte[] inBuffer = new byte[7];
  //int inBuffer = 0;
  while (arduinoPort.available() > 0) {
    inBuffer = arduinoPort.readBytes();
    arduinoPort.readBytes(inBuffer);
    if (inBuffer!= null){
      //println(inBuffer);
//      String myString = new String(inBuffer);
//      println(myString);
        if(inBuffer[0] == '1'){
          like =  + 1;
        }
        if(inBuffer[0] == '2'){
          hate = hate + 1;
        }
        if(inBuffer[0] == '3'){
          like2 = like2 + 1;
        }
        if(inBuffer[0] == '4'){
          hate2 = hate2 + 1;
        }
        if(inBuffer[0] == '5'){
          like3 = like3 + 1;
        }
        if(inBuffer[0] == '6'){
          hate3 = hate3 + 1;
        }
        if(inBuffer[0] == '7'){
          like4 = like4 + 1;
        }
        if(inBuffer[0] == '8'){
          hate4 = hate4 + 1;
        }
        if(inBuffer[0] == '9'){
          like5 = like5 + 1;
        }
        if(inBuffer[0] == '10'){   < here got a problem > from '1' to '9' it's ok.  reach '10', got some error "badly formed character constant "   
          hate5 = hate5 + 1;
        }
        if(inBuffer[0] == '11'){
          like6 = like6 + 1;
        }
        if(inBuffer[0] == '12'){
          hate6 = hate6 + 1;

// tested man
        print("like = ");
        print(like);
        print("  hate = ");
        println(hate);
        output.println(hour() + ":"+ minute()+"\t"+ like + "\t" + hate);
        fill(256, 256, 256);
        rect(100, 250, 100, 100);
        fill(0,0,0);
        text(like, 100, 280);
        text(hate, 150, 280);
    }
  }
}
   
void keyPressed() { // Press a key to save the data
  output.flush(); // Write the remaining data
  output.close(); // Finish the file
  exit(); // Stop the program
}


void mouseClicked() {
  if(mouseX >500 & mouseX < 550){
    if(mouseY >500 & mouseY < 550){
      output.flush(); // Write the remaining data
      output.close(); // Finish the file
      exit(); // Stop the program
    }
  }
}