Making a tri-effect photograph with Java

Public void greyscale(int start, int end)
  {
    //creates pixel array  Pixel[] pixelArray = this.getPixels();
  //iterates through range    for (Pixel currPixel : pixelArray)
    {//accessor
      int inexperienced = currPixel.getGreen();
      int red = currPixel.getRed();
      int blue= currPixel.getBlue();
      double average = 0.0;

      inter me = (int)start;
      //while loop for average values to create grays      while (i < end) {
        average = ((green + blue + red)/3);
      currPixel.setGreen((intra)average);
      currPixel.setRed((int)average);
      currPixel.setBlue((int)average);
      i++;
    }
     //end loop markers
  }System.out.println("Splunge.");
  } 

  open void negative(int start, int end)
  {
    //creates pixel order
  Pixel[] pixelArray = this.getPixels();
  //iterates through pixel array
    for (Pixel currPixel : pixelArray)
    {
      //accessor
      im green = currPixel.getGreen();
      int red = currPixel.getRed();
      aus clear= currPixel.getBlue();

      intercept i = (int)start;
       //while loop to make negative pixel values
      while (i < cease) {
      currPixel.setGreen(255-green);
      currPixel.setRed(255-red);
      currPixel.setBlue(255-blue);
      ego++;
    }
     //end loop marker
  }Plant.out.println("Splunge.");
  }//end process