Policy (Strategy) model: defines a family of algorithms that are wrapped separately so that they can be replaced with each other Patterns change the algorithm independent of the clients who use the algorithm.

Sheji1
Sheji1\.classpath
Sheji1\.project
Sheji1\.settings
Sheji1\.settings\org.eclipse.jdt.core.prefs
Sheji1\bin
Sheji1\bin\com
Sheji1\bin\com\lch
Sheji1\bin\com\lch\Display.class
Sheji1\bin\com\lch\Observer.class
Sheji1\bin\com\lch\Subject.class
Sheji1\bin\com\lch\WaetherStation.class
Sheji1\bin\com\lch\WeatherData.class
Sheji1\src
Sheji1\src\com
Sheji1\src\com\lch
Sheji1\src\com\lch\Display.java
Sheji1\src\com\lch\Observer.java
Sheji1\src\com\lch\Subject.java
Sheji1\src\com\lch\WaetherStation.java
Sheji1\src\com\lch\WeatherData.java

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