A DESCRIPTION OF THE PROBLEM :
There is a typo in the documentation for javax.imageio.ImageReader. This typo occurs in both the documentations for Java SE 1.4.6 and Java SE 7 (and likely the versions in between as well).
In ImageReader.getDestination(), under the parameters, it says " width - the true width of the image or tile begin decoded " . I believe 'begin' should be 'being'.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
width - the true width of the image or tile being decoded
ACTUAL -
width - the true width of the image or tile begin decoded

URL OF FAULTY DOCUMENTATION :
http://docs.oracle.com/javase/1.4.2/docs/api/javax/imageio/ImageReader.html#getDestination(javax.imageio.ImageReadParam, java.util.Iterator, int, int)