#brainfuck, 33 bytes

,>,[<[->->+<<]>[[-]>.<]>[-]<<,>,]

Compared to Java, this is very compact, however, I'm afraid of brainfuck-golfer answerer. And feel free to mention if there's a bug. Assuming EOF is 0, input doesn't contain invalid input, the cell is initially zero, and the cell value range is finite and cyclic. No other assumption is present.

Explanation:

Memory Cell Map

+---------+---------+-----------------+
|1st input|2nd input|copy of 1st input|
+---------+---------+-----------------+

Instruction

,>,                               read two instruction at once | first to first cell |
                                  second to second cell
   [                              Until the input is EOF
    <                             look at first cell
     [->->+<<]                    move the first cell to additional cells while
                                  subtracting the second cell with this at same
                                  time
              >[                  if the second cell is nonzero (it means that first cell and
                                  the second cell is the same)
                [-]>.<            Print the copied first input
                      ]
                       >[-]       clear the first input to prevent it polluting next input
                           <<,>,  continue with next two input
                                ]