Learning JAVA concepts

I learned java abstract data structures such as arrays,linked list,queue and circular stack.

Implemented above data structures in eclipse.I had spent nearly 3 hrs learning theory and 2 in implementing these concepts.I learned theory concepts from geeksforgeeks and implementation from telusko learnings playlist.

I revised data structures and tried to implement in eclipse.

References:

https://www.geeksforgeeks.org/array-data-structure/

https://www.geeksforgeeks.org/data-structures/linked-list/

https://www.geeksforgeeks.org/stack-data-structure/

https://www.geeksforgeeks.org/queue-data-structure/

https://www.youtube.com/watch?v=jc1t0KFsOcs&list=PLsyeobzWxl7oRKwDi7wjrANsbhTX0IK0J