From the course: Java Design Patterns: Structural
Join today to access over 22,600 courses taught by industry experts or purchase this course individually.
Change component behavior dynamically - Java Tutorial
From the course: Java Design Patterns: Structural
Change component behavior dynamically
- [Instructor] Now that I've got a decorator class. I can use it to change any of my cycle objects. Let's say I want just the middle cycle, to have a red border and the others to stay the same. To do this I can go to my canvas class and scroll down to the paint method, and I'll put a new line above where I'm drawing cycle two. I want cycle two to have a red border. So I'll do circle two, is equal to a new component with red border, and I'll pass in the circle two object. That's all I need to do. So if I rerun the program now, I can see it's drawn canvas and circle two the middle circle now has a red border. So I've dynamically changed the color of the circle, without effecting any of the others. If I wanted to do things like add stripes to the shapes, or make them 3D, or make them twice the size, I could add decorators for all of these things too. I could also NS them. So if I wanted a circle with a red border and a…
Practice while you learn with exercise files
Download the files the instructor uses to teach the course. Follow along and learn by watching, listening and practicing.
Download courses and learn on the go
Watch courses on your mobile device without an internet connection. Download courses using your iOS or Android LinkedIn Learning app.