读下列代码，说出这段程序的功能。。。importtjava.io.*;;;publiccclasssTest{{{ publiccstaticcvoiddmain((Stringg[]]argv)){{{tryy{{{ BufferedReaderriss=== newwBufferedReader((newwInputStreamReader(System.in));;; StringginputLine;;; Whilee((inputLinee==is.readLinee())!==null)){{{ System.out.println(inputLine);;; }}}is.close();;; }catchh(IOExceptionne)){{{ System.out.println("IOException::""++e);;; }}}}}