Andrews observer mode to achieve, the environment in the first java achieve its function, for those who want to understand the use of Android is a good observer pattern identification.

观察者模式\.classpath
..........\.project
..........\.settings\org.eclipse.jdt.core.prefs
..........\bin\Cat.class
..........\...\Mouse.class
..........\...\Observer.class
..........\...\Person.class
..........\...\Test.class
..........\src\Cat.java
..........\...\Mouse.java
..........\...\Observer.java
..........\...\Person.java
..........\...\Test.java
..........\.settings
..........\bin
..........\src
观察者模式

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