Answer Posted / hemasankar reddy suggu

1)Hashtable method all are synchronized where as HashMap
does not Synchornized all methods
2)HAshtable object is thread safe where HashMap object is
not thread Safe
3)Hashtable perfomance is low where Hashtable performance is
High
4)null is not allowed in Hashtable but HAshMap null is allowed
5)Hashtable is Interduced in 1.0V where HashMap interduced
in 1.2V

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For ease of programming you can consider the maze as a 2D array with colors represented by below integer and characters (in capital letters). • B - Black • W -White • G- Green • R- Red R B W B W W W W W W B W B B W W W W W W W B W B W W W B W W W W B B W W W B W W W B W W B B B B W B W B W W B W W W B W W W B B B W W B W W W B W W B W B W W W B W B W W W W B B W W W W B W W W W W G Shortest Route Problem: • Solution that finds the shortest Route between Red and Green  White will have 1 Weight.  Red and Green carry no weights.  Shortest path is the path with less weight when you add up the weights in the path.

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