Write a program that takes a string and counts the frequency of each character (excluding spaces) using streams. Return a Map<Character, Long> with the character as the key and the count as the value.

Split the input string considering as string separator all the characters with the only exception of the characters specified in charsDoNotBeRemoved param. static java.lang.String[] ...

The Spark library provides a fluent interface for validating and transforming input data in Java. It includes functionality for validating strings and integers with a variety of built-in methods, ...