Java Tips and Tricks play online

(Share other tips and tricks you would like to contribute in the reviews and I will add them in the app for your future references)

Learn simple Java (8) tips and tricks for declarations of objects and primitive types. This app aims to be a place for users to reference Java tips and tricks that are not used frequently and that it would be a hassle to look it up online (Not remembering where you jot it down). Be it simple tricks like creating a max-heap for a list of arrays or trying to convert primitive types to object types.

Current content:
Arrays
Maps
Sets
Queue/Stacks
Min/Max Heap
Strings
Simple Multithreading spring