Design Pattern: Command
A First Look at wikipedia can tell us much of this pattern. objects bearing the pattern are:
- Subject Command - characterized by having a type and parameters to carry
- Subject CommandType - a type associated with, usually implemented through enumeration.
The object is created (for example, associating the listener to a button) and sent to a system via Stream, the external system uses it directly without having to interpret numeric strings or held constant.
Good use of patterns is in the command handler in the client-server systems.
And here also sample code on the pattern
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