Intermediate operations

We have already seen how a Stream object that represents a source and emits elements can be created. As we have mentioned already, the operations (methods) provided by the Stream interface can be divided into three groups:

• The methods that create a Stream object based on a source.
• Intermediate operations that accept a function and produce a Stream object that emits the same, or modified, values.
• Terminal operations that complete the stream processing, close it, and produce the result.

In this section, we will review the intermediate operations that, in turn, can be grouped by their functionalities.

Filtering

This group includes operations that remove duplicates, skip some of the elements, and limit the number of processed elements, only selecting those that are needed: 

• Stream<T> distinct(): Compares stream elements using the Object.equals(Object) method, and skips the duplicates.
• Stream<T> skip(long n): Ignores the provided number of stream elements that are...