Can't we implement stacks and queues on java

Answer 1

yes you can implement stacks and queue in Java. you might be surprised because in this app there is not any lesson for stacks and queues. it is because this app is just for beginners who faces difficulties in getting started with.
if you want to learn for stacks and queues I will recommend you to search on YouTube. as on YouTube you can a better explanation of data structures. I also learned from YouTube

Answer 2

Go for Nptel courses on data structure. It might go quiet slow but explanation is top notch!