Define a public class named Flop
with a single public instance method named flip
that takes no parameters and
returns a Boolean
.
Flop
should also provide a single public constructor that accepts a Boolean
argument and sets the initial
state of
the Flop
instance.
Flop
maintains one piece of private state: the boolean
.
Calling flip
changes the boolean
from true
to false
or false
to true
and returns the old (not the
new) state of the boolean
.
So, for example:
Note that the internal state should be private.
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