Discover some of the most useful, important and common design patterns in Java; reusable code patterns that you can use to structure your program and perform common tasks. Includes lots of examples with full source code. "Design Patterns" has been the big buzz phrase in the Java community for some time now, and if you want to be able to write effective Java programs, work as a Java developer or pass exams in Java, you can't afford to miss out. Fortunately, this course is entirely free :)
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We need the observer pattern in order to complete our model view controller pattern. Even if you don't use MVC, the observer pattern is vital to user interface programming. It's one of the vital structural patterns that hold modern software together. It can also be quite tricky to understand initially, so for that reason we'll go through the theory of it before actually tackling it.
After working as a software developer and contractor for over 14 years for a whole bunch of companies including CSC, Proquest, SPSS and AT&T in the UK and Netherlands, I decided to work full-time as a private software trainer. I now live in the beautiful city of Budapest, Hungary, from where I run the website Cave of Programming.