问在java中返回行int%=2，以及语句的实际行为

EN

        int++;
        int %= 2;

   private void play() {
        // while the board does not have a winner neither is full
        while(!board.hasWinner() && !board.isFull()) {
            //print the state of the game
            update();
            //set field for the current player and the passed mark
            board.setField(players[current].determineMove(board), players[current].getMark());
            //go to the next player
            current++;
            // current= current % 2
            //
            current %= 2;
        }
        update();
        printResult();
    }

  private int current;

    // -- Constructors -----------------------------------------------

    /**
     * Creates a new Game object.
     * @requires s0 and s1 to be non-null
     * @param s0 the first player
     * @param s1 the second player
     */
    public Game(Player s0, Player s1) {
        board = new Board();
        players = new Player[NUMBER_PLAYERS];
        players[0] = s0;
        players[1] = s1;
        current = 0;
    }