This solution uses a char field
to represent the rank, a char field
to represent the file, and a a String field
to represent the piece. Because char
is an integer type in Java, arithmetic can be used
to subtract ranks and subtract files to determine
adjacency and connectivity between squares.
This solution uses String fields
to represent the rank, file, and piece. This
representation complicates the computation of
adjacency and connectivity. One solution is to
create a string containing all of the files
(in order from a to h) and a string containing all
of the ranks (in order from 1 to 8). The index of a
specified file or rank can be determined using the
string method indexOf; arithmetic can
then be used to subtract rank indices and subtract
file indices to determine
adjacency and connectivity between squares.