Some important methods that we can use to manipulate the ArrayList are as below with the description: void add(int index, Object obj) : add method with two parameters is used to insert an element at ...

We will focus on the relationship between polymorphism and Java inheritance. The main thing to keep in mind is that polymorphism requires an inheritance or an interface implementation. You can see ...

It’s easy to remove duplicates from a list in Java. There are a variety of functions in Java ... If you only need a unique list of the duplicate items, you could use a HashSet instead of an ArrayList ...