If you have a ByteArrayInputStream that's not positioned at offset 0, calling skip() with Long.MAX_VALUE does not move the position to the end of the stream and return the number of bytes skipped, as one would expect. This is because skip() checks whether (pos + n > count), which evaluates to false because pos+n overflows and becomes negative.

To reproduce, run the following code:

ByteArrayInputStream baos = new ByteArrayInputStream(new byte[1024]);
System.out.println("Read first byte: " + baos.read());
System.out.println("skip(): " + baos.skip(Long.MAX_VALUE));
System.out.println("Read after end of stream: " + baos.read());

Expected output:

Read first byte: 0
skip(): 1023
Read after end of stream: -1

Actual output:

Read first byte: 0
skip(): 9223372036854775807
Read after end of stream: 0