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Java 9 Dependency Injection
book

Java 9 Dependency Injection

by Nilang Patel, Krunal Patel
April 2018
Intermediate to advanced content levelIntermediate to advanced
246 pages
6h 11m
English
Packt Publishing
Content preview from Java 9 Dependency Injection

Injection using the setter method versus the constructor

There are two straightforward options of DI – setter- or constructor-based DI. Both of these methods perform the same operation—injecting dependencies—but at different times of the object's lifespan. One happens during object instantiation, while the other happens on calling the setter method explicitly.

A very obvious dilemma comes into the picture when you implement DI with these two options. Understanding the difference is important because it reflects the basic problem of the object-oriented programming context: do we initiate the field variable with the constructor argument or through the setter method?

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Publisher Resources

ISBN: 9781788296250Supplemental Content