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Uh oh!

buffer.length should be buffer.length - 1

The index of an array starts at 0 but the length starts at 1, therefore, you must use buffer.length - 1.

Your program must wait until the Buffer has data available.

URL is deprecated, BTW.

InputStream is = new BufferedInputStream(uc.getInputStream());
while(is.count < 1024) ;
//do other stuff
is.close();

Where is `buffer` declared?

Perhaps a simple LOGGER.info("InputStream Successfully initialized!") or System.out.println("InputStream Successfully initialized!"); statement will give a large enough delay to let the buffer fill up.

Sometimes, the minuscule delay caused by a `print` statement can make a surprisingly large difference.

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