I have been having null pointer exception error and string unmatching.

smnbsn

import processing.serial.*;
int slideStep = 75;    

PImage currentImage, nextImage; 


int imgIndex = 0; 
int slideOffset; 
String[] fileList ; 
Serial myPort;

class FilterImages implements java.io.FilenameFilter 
{ 

  public boolean accept(File dir, String fname) 
{
    String[] extensions = {".png", ".jpeg", ".gif", ".tga", ".jpg"};


    for (int i = 0; i < extensions.length; i++) { 
      if (fname.toLowerCase().endsWith( extensions[i]))
     {
        return true;

      }
    } 
    return false;
  }
}


void loadFileNames()
 { 
  java.io.File dir = new java.io.File(dataPath(""));

  fileList = dir.list(new FilterImages());
}

void setup()

 {

  size(displayWidth, displayHeight); 
  loadFileNames();  
  imageMode(CENTER); 
  currentImage = loadImage(dataPath("") + fileList[0]);
  currentImage.resize(0, height);

  println(Serial.list()); 

  myPort = new Serial(this, Serial.list()[0], 9600); 
}


void advanceSlide() { 
  imgIndex++; 
  if (imgIndex >= fileList.length) { 
    imgIndex = 0;
  }
  slideOffset = width;
}

void reverseSlide() {
  imgIndex--; 
  if (imgIndex < 0) { 
    imgIndex = fileList.length - 1;
  }
  slideOffset = width * - 1; 
}

void draw() {


  background(0);
  image(currentImage, width/2, height/2); 


  if (slideOffset != 0) { 


    image(nextImage, slideOffset + width/2, height/2);
    if (slideOffset > 0) { 
      slideOffset -= slideStep;
      if (slideOffset < 0) {
        slideOffset = 0;
      }
    }
    if (slideOffset < 0) { 
      slideOffset += slideStep;
      if (slideOffset > 0) {
        slideOffset = 0;
      }
    }
    if (slideOffset == 0) { 
      currentImage = nextImage;
    }
  } 
  else {


    if (myPort.available() > 0) {

      char inByte = myPort.readChar();
      print(inByte); 

      if (inByte == 'F') { 
        advanceSlide(); 
      }
      if (inByte == 'B') {
        reverseSlide();
      }


      nextImage = loadImage(dataPath("") + fileList[imgIndex]); 
      nextImage.resize(0, height);
    }
  }
}

koogs

edit post, highlight code, press ctrl-o

what line is the error on?

smnbsn

error on line 59 and line 62. Thanks

koogs

Don't post pictures, they are unreadable.

smnbsn

line 46 and 49