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Hackerrank Java OOP section: https://www.hackerrank.com/challenges/java-interface/problem?isFullScreen=true.

https://www.hackerrank.com/challenges/java-negative-subarray/problem.

Hackerrank Java OOP section: https://www.hackerrank.com/challenges/java-method-overriding/problem?isFullScreen=true.

Java Hackerrank OOP Section: (Could not solve on my own - come back to review later) ...

Could not solve on my own - come back to review later https://www.hackerrank.com/challenges/java-factory/problem?

https://www.hackerrank.com/challenges/java-loops-i/problem.

Could not solve on my own - come back to review later https://www.hackerrank.com/challenges/java-strings-introduction/problem.

Hackerrank Java OOP section: (Could not solve on my own - come back to review later) ...

https://www.hackerrank.com/challenges/java-if-else/problem.

https://www.hackerrank.com/challenges/java-generics/problem.

Hackerrank OOP Section #1.

Could not solve on my own (come back to review later) https://www.hackerrank.com/challenges/java-singleton/problem?

https://www.hackerrank.com/challenges/java-int-to-string/problem.

☕Buy me a virtual coffee: https://ko-fi.com/valerio_afk In this video, I solve some programming exercises found on HackerRank ...

https://www.hackerrank.com/challenges/java-stdin-and-stdout-1/problem.

https://www.hackerrank.com/challenges/java-anagrams/problem.

HackerRank "Digit sum" challenge Hey guys! Hopefully you found a solution that helped you! The Content is licensed under ...

https://www.hackerrank.com/challenges/java-date-and-time/problem (could not solve on my own - come back to review later)

https://www.hackerrank.com/challenges/java-biginteger/problem.

Could not solve on my own (come back to review later) https://www.hackerrank.com/challenges/java-iterator/problem?