Understanding Covariance and Contravariance in 10 Minutes

Sun, 07 May 2023 00:00:00 +0000

Variance is a concept in programming that is prone to mistakes. I used to have only a vague understanding of it, so this time I specifically looked up a lot of information online to thoroughly study the issue. I also took the opportunity to write a blog post introducing it, so that if I forget in the future, I can quickly recall it.

Here, we’ll use the classic Java as the primary language to briefly explore this issue.

Java - Category - Techstay's Tech Blog

Understanding Covariance and Contravariance in 10 Minutes