http://www.junlu.com/
http://www.junlu.com/
Hi,
Command Pattern: Normally if you
want to communicate between two objects, then first object have a reference of
second object. First object executes a particular method in the second object. But using command pattern, first object holds
a reference of the command object instead of second object. The first object
sends the command to the command object by executing a method command object.
The command object dispatches to a specific recipient
Strategy pattern: Encapsulating each and every behavior in a separate class
is called as strategy pattern. Basically decoupling algorithms.
If an object has several different behaviors, it is much simpler to keep track
of them if each behavior is a separate class, It is
easy to add, remove, or change any of the behaviors, it is a much simpler task,
since each one is its own class
-----Original Message-----
From: An interest list for Sun
Java Center J2EE Pattern Catalog [mailto:J2EEPATTERNS-INTEREST@JAVA.SUN.COM] On Behalf Of Julia Liu
Sent:
To:
J2EEPATTERNS-INTEREST@JAVA.SUN.COM
Subject: Q about command and
strategy patterns
Hi,
What is a difference between command pattern and
strategy pattern?
Thanks
Julia Liu
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