Apache Commons utilities FileUtils and IOUtils

The popular companion of JCL is the Apache Commons project (https://commons.apache.org) that provides many libraries that compliment the JCL functionality. The classes of the org.apache.commons.io package are contained in the following root package and sub-packages:

• The org.apache.commons.io root package contains utility classes with static methods for common tasks, like the popular FileUtils and IOUtils classes described in the sections Class FileUtils and Class IOUtils, respectively.
• The org.apache.commons.io.input package contains classes that support input based on InputStream and Reader implementations, like XmlStreamReader or ReversedLinesFileReader.

• The org.apache.commons.io.output package contains classes that support output based on OutputStream and Writer implementations, like XmlStreamWriter or StringBuilderWriter.
• The...