-----------------------------------------------------------------------------
Generates a twodimensional character-array which is an ASCII representation
of the labyrinthfield.
perform action from getSourceActions on the transferrable invoke
acceptDrop or rejectDrop invoke dropComplete if its a local (same
JVM) transfer, use StringTransferable.localStringFlavor find a match
for the flavor check the operation get the transferable according to
the chosen flavor do the transfer
perform action from getSourceActions on the transferrable invoke
acceptDrop or rejectDrop invoke dropComplete if its a local (same
JVM) transfer, use StringTransferable.localStringFlavor find a match
for the flavor check the operation get the transferable according to
the chosen flavor do the transfer
-----------------------------------------------------------------------------
class representing an Instruction which consists of one Condition
and one Action.