extracting color from an image in java

[sarah49]

i'm working on this java code to extract red,green and blue colors from an image.

        	public class Mainclass
    {
	    public static void main(String args[]) throws IOException
	    {    
         File e = new File( "image.jpg" );
	        BufferedImage bi= ImageIO.read(e);
	        int w = bi.getWidth();
	        int h = bi.getHeight();  
        for (int x=0; x <= w; x++){
	      for (int y = 0; y <= h; y++){ 
             int pixelCol=bi.getRGB(x,y);              
           int r= (pixelCol>>16) & 0xff;
          int b = pixelCol & 0xff;
             int g = (pixelCol>>8) & 0xff;
      System.out.println(r,b,g);
   }}

I dont know why i'm getting this message.
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException:Coordinat e out of bounds!
at sun.awt.image.ByteInterleavedRaster.getDataElement s<ByteInterleavedRastere.java:301>
at java.awt.image.bufferedImage.getRGB<BufferedImage. java:870>
at Mainclass.main<Mainclass.java:27>

[Fubarable]

upper bounds of Java arrays are 1 minus the length since arrays go from 0 to length - 1. So when you use a for loop that goes from 0 to <= w, you'll go out of bounds. Try going from 0 to < w, and same for y.

Also, please improve your code formatting because your code is difficult to read.

Oh, and welcome to the java-forums!

[sarah49]

yea sure thanks a lot!!!

[rosedolly]

please anybody guide me in my final year project that is "extract text from image".

[Fubarable]

please anybody guide me in my final year project that is "extract text from image".

Sure. Start your own thread rather than hijack an old thread, and ask specific questions and we'll likely be more than glad to help.

Locking this thread.