question: @ Override public String toString ( ) { int len = sessionId . length ; StringBuffer s = new StringBuffer ( 10 + 2 * len ) ; s . append ( "{" ) ; for ( int i = 0 ; i < len ; i ++ ) { s . append ( 0x0ff & sessionId [ i ] ) ; if ( i != ( len - 1 ) ) s . append ( ", " ) ; } s . append ( "}" ) ; return s . toString ( ) ; }
target:  Returns the ID as a string 