Community driven content discussing all aspects of software development from DevOps to design patterns. The Java Scanner class provides methods that take String input and convert that String into any ...

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.

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, ...

In prior Java 101 articles, I referred to the concepts of redirection, standard input device, and standard output device. To demonstrate inputting data, several examples called System.in.read(). It ...