How to build the concepts of pointer?

Question

I really don't know how to use pointer in my coding practice.
How should i improve this?

Answer 1

In java

Java is oop lang. There is no concept about pointer. But in java there is way which can apply pointer concept that is referance veriable. In Java linked list concept based upon referance veriable.

Tutorial :
https://youtu.be/NaZJ5fmzDhA

Example :
https://code.sololearn.com/c5YUPXU24Y7e/?ref=app