Class WritableRaster setPixels

Question

i read the explanations give in the docs for setPixels in WritableRaster class
i could not understand iArray?
what is the use of it?
public void setPixels(int x,
                      int y,
                      int w,
                      int h,
                      int[] iArray)this is wat given in doc :
w - Width of the pixel rectangle.
h - Height of the pixel rectangle.
iArray - The input int pixel array.

Answer 1

to set a pixel its enough if we have the location of that pixel (x,y)
here a rectangle of size (w *h) located  at x,y
what does this mean : "Sets all samples for a rectangle of pixels from an int array containing one sample per array element."
http://java.sun.com/javase/6/docs/api/java/awt/image/WritableRaster.html#setPixels(int,%20int,%20int,%20int,%20int[])