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Observer Design Pattern using Java

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Using the Built-in Observer and Observable Classes

10:39 with Craig Dennis

In the java.util package there is a class named Observable. It's been there a while, let's dust it off and use it to make our Restaurant Simulator hummmm.

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    it's clear that we're going to need to make things more extensible. 0:00
    Different clients are gonna have different needs, and 0:00
    we need to be able to configure things for each of our clients specifically. 0:02
    Observer to the rescue. 0:06
    So I've got some great news for you. 0:07
    The Observer pattern has been included in the JDK pretty much from the beginning. 0:09
    It's fairly well documented, and it's pretty straightforward to implement. 0:14
    There are some complaints about the way that it's implemented, 0:17
    and we'll explore those after we get our hands dirty with it a little bit. 0:20
    Now, a quick word of warning here. 0:23
    There's been a somewhat recent trend in what is known as reactive extensions. 0:25
    RxJava is the Java flavored version. 0:29

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