[RandomJava-101] update csv file

[RandomJava-101] add OpenCSV example

[RandomJava-101] add parallel unit tests examples

[RandomJava-101] add two parameterized test classes

[RandomJava-101] separate out Parameterized tests

[RandomJava-101] upgrade Java version to 17 along with Lombok version…

[RandomJava-101] add a Utility class to process file

[RandomJava-101] update file IO method

[RandomJava-101] update modifier for Java method

add encryption and description in Spring example

add encryption and description example

add enum example

add Java Consumer examples

add a simple one thread example

add a stream example

add a demo for HashSet

add Demo suffix to avoid naming conflict

rename class to be self-explanatory

remove package to be java_collections

add a HashMap example

update format of ConnectionLimiter

update TaskRunner

add a distinct method using Java8

update TestThread class

update ThreadIsCool class

format MergeSort

add equality examples

add CompletionService demo

update comments

add Java8 stream example