Oracle has changed the way businesses order Java SE it went from one time to fee to a subscription. 

A LRU cache is a container that ensures its maximum capacity is never exceeded by using a Least Recently Used strategy to discard elements.

The decision reached on March 27, 2018 was that:
Google’s use of the Java API packages was not fair as a matter of law. 

PM> Install-Package MaterialShowcaseView

> dotnet add package MaterialShowcaseView

1. Packages and Assert
2. Reading and Writing to Files
3. Polymorphism
4. Anonymous Classes
5. Multithreading
6. Introduction to GUI Programming
7. GUI Windows Builder
8. 2-D Game Programming 

1. Introduction
2. Getting Started
3. Writing Output
4. Reading Input
5. Data Types and Variables
6. Operators and Expressions
7. Control Structures
8. Object-Oriented Programming
9. Example Programs and Conclusion 

Using VS Code to Debug Java Applications 

So now the score is .Net Core 2.0 6 - Java 4. 

C# vs. Java: 5 Irreplaceable C# Features We’d Kill to Have in Java 

Google I/O 2017 had several major announcements, but one of the most interesting to me is “first-class support for Kotlin” on Android.