Generics
- Wrapper Class: https://www.tutorialspoint.com/why-do-we-need-a-wrapper-class-in-java
- Overview of Java Generics: https://www.coursera.org/lecture/java-for-android/overview-of-java-generics-fYgF
- Java Generics Example Tutorial – Generic Method, Class, Interface: https://www.journaldev.com/1663/java-generics-example-method-class-interface
- Generics in Java: https://www.geeksforgeeks.org/generics-in-java/
- Generics in Java: https://www.tutorialspoint.com/java/java_generics.htm
- Generics in Java (Chi): http://godleon.blogspot.com/2007/07/class-generic-generic-j2se-5.html