public class Portal extends Tile
{
    public static final String START = "AA";
    public static final String EXIT = "ZZ";

    public Portal (Coordinate position, char portalId)
    {
        super(position, TileId.PORTAL);
    }
}

@@ -223,12 +223,146 @@
 L);%0A
-    %7D
+%0A        _portalId = portalId;%0A    %7D%0A%0A    public final char getId ()%0A    %7B%0A        return _portalId;%0A    %7D%0A    %0A    private char _portalId;
 %0A%7D%0A

Update Portal.java