博客介绍了行为算法的优势，如替代子类化、在类中定义行为消除条件语句、便于扩展新行为等。还说明了其适用场景，包括多类仅行为不同（如servlet API）、需要算法的不同变体、算法使用客户端未知数据等。
Benefits:
• It provides a substitute to subclassing.
• It defines each behavior within its own class, eliminating the need for conditional statements.
• It makes it easier to extend and incorporate new behavior without changing the application.
Applicable Scenarios:
• Multiple classes differ only in their behaviors. The servlet API is a classic example of this.
• You need different variations of an algorithm.
• An algorithm uses data that is unknown to the client.
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