This question is repeated here. Please direct all replies there.
I'm no administrator, but I've seen the request to not ask the same question in more than one forum often enough that I feel qualified to pass that request on to others. You may want to read the document on How To Ask Questions The Smart Way. In particular, look at the second link in the list.
subject: do java Api provide methods to convert number from binary to decimal or HEXA ,Octal