June 2018
Intermediate to advanced
280 pages
7h 46m
English
Content preview from Design Patterns and Best Practices in Java
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Composite pattern
The composite pattern, as the name suggests, is used when composing objects into a complex structure that acts as one (refer to the following diagram). Internally, it is using data structures, such as trees, graphs, arrays, or linked lists to represent the model:
The JVM offers the best example of a composite pattern, since it is usually implemented as a stack machine (for portability reasons). Operations are pushed and popped from the current thread stack. For example, to calculate what 1 + 4 - 2 equals, it pushes 1, pushes 4, and executes add. The stack now has only value 5, pushes 2, and executes minus. Now the stack has ...
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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.