March 2002
Intermediate to advanced
496 pages
8h 51m
English
Content preview from Design Patterns Java™ WorkbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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A Classic Example: Observer in Swing
The most common case in which clients depend on changing objects occurs in graphical user interfaces. Whenever a user clicks a button or adjusts a slider, many objects in the application may need to react to the change. Java Swing anticipates that you will be interested in knowing when a user changes a Swing component, and the OBSERVER pattern is evident throughout Swing. Swing refers to interested clients as “listeners” and lets you register as many listeners as you like to be notified of a component's events.
Consider a typical Oozinoz application with a Swing GUI, such as the one that Figure 9.1 shows. This application lets a fireworks engineer experiment visually with parameters that determine the relationship ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.