Not related to question

Hey my batch will start from july ,I know java and not c++.
can someone tell me what what java topics i should be comfortable with.

Is your course in Java or C++?
Language will not be a barrier. You will learn about it as you proceed with the course. Basic requirements will be covered.

my course is competetive programming

i just wanna what are the data structure and java topics i should be good at before my course starts

You should be familiar and have solved easy-medium questions of Arrays, Stacks, Linked Lists, Trees, Graphs. You should have some knowledge of DP.
Requirement is just that you must know these topics and are comfortable in solving their easy-medium questions. Your basics must be clear.

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.