Description: Implement the observer pattern in java, there are two windows which are observer, one observable, the one which is observed select a choice, then the observer take action
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Observer
........\.classpath
........\.project
........\.settings
........\.........\org.eclipse.jdt.core.prefs
........\bin
........\...\framePkg
........\...\........\ChangeColorFrame.class
........\...\........\ColorFrame.class
........\...\........\ListColorFrame.class
........\...\........\Main.class
........\...\........\MessagePanel.class
........\...\interfacePkg
........\...\............\Observable.class
........\...\............\Observer.class
........\src
........\...\framePkg
........\...\........\ChangeColorFrame.java
........\...\........\ColorFrame.java
........\...\........\ListColorFrame.java
........\...\........\Main.java
........\...\........\MessagePanel.java
........\...\interfacePkg
........\...\............\Observable.java
........\...\............\Observer.java