My solutions to HackerRank problems

Solutions of Data Structures and Algorithms in Java 2nd Edition by Robert Lafore. Adding practice problems and solutions.

Java Programming Tutorial OOP Exercises. A basic guide to learning java at FPT University for beginners

Compilation of all study materials related to code with harry java course with assignment solutions

With OOP, programs can be broken down into small problems that can be solved easily. Why is OOP so hard? Following our tutorial, you will say this is one of the worst questions ever.

Fun katas in Java, Groovy and Kotlin