If you want to push your Java skills to the next level, this book provides expert advice from Java leaders and practitioners. You'll be encouraged to look at problems in new ways, take broader responsibility for your work, stretch yourself by learning new techniques, and become as good at the entire craft of development as you possibly can

Edited by Kevlin Henney and Trisha Gee, 97 Things Every Java Programmer Should Know reflects lifetimes of experience writing Java software and living with the process of software development. Great programmers share their collected wisdom to help you rethink Java practices, whether working with legacy code or incorporating changes since Java 8

A few of the 97 things you should know:
"Behavior Is Easy, State Is Hard"-Edson Yanaga
"Learn Java Idioms and Cache in Your Brain"-Jeanne Boyarsky
"Java Programming from a JVM Performance Perspective"-Monica Beckwith
"Garbage Collection Is Your Friend"-Holly K Cummins
"Java's Unspeakable Types"-Ben Evans
"The Rebirth of Java"-Sander Mak
"Do You Know What Time It Is?"-Christin Gorman