I focus on the ridiculously useful new overloaded Files.walkFileTree methods that provide an easy way for Java, Groovy, or other JVM language developers to easily traverse a file/directory tree ...

Java programs without a graphical user interface use a computer's command line to interact with the user. It is vital that the program's command line output is properly formatted and spaced so ...

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().