Slicing Operations in Stream

The slicing operations are intermediate operations, and, as the name implies, they are used to slice a stream.

Now, we will look at some of the most common slicing methods present in Streams API.

1. distinct()

The first operation that we are going to discuss is distinct(). It returns a stream consisting of the distinct elements (according to Object.equals(Object)) of this stream.

So, if you have a stream of custom objects then your custom class should override equals() and hashcode() methods.

Let’s look at an example to understand distinct() better. In the below example, we have a list of countries. The list can contain duplicate elements as well. We need to print all the distinct countries.