Programming is fun! Java is very rich and there is so much learn from the language and its libraries.
Good knowledge in Core Java is important for using or developing Java based libraries and tools (e.g., Hadoop, Spring, Hibernate, Storm, ...). Core Java is also important for cracking Oracle's Java certifications (e.g., OCPJP 8). Core Java skills gives you an edge in the job market so it makes perfect sense to hone your Java skills.
Come and join us if you want to explore core Java topics, including: