Learning the strengths and weaknesses of the different Android programming languages will help you choose which one to learn for the apps you want to create.
A good thing to know for any Java dev working with Excel spreadsheets, let's see how the Apache POI library can help read and write Excel files with little overhead.
Canary deployments are a good way to see how a new release will affect end users without the risk. Learn how to carry out a canary deployment in this walkthrough.
From learning JDK 8 to studying the JVM's internals, getting more efficient with your IDE, and trying your hand at Kotlin, here is some advice to be a better Java dev.
