In Java, there are several ways to check if a directory exists, primarily using the java.nio.file.Files and java.io.File classes.
java.nio.file.Files
java.io.File
In Java, the java.nio.file package is your friend for temporary files.
java.nio.file
Reading a file is a breeze in Java, especially with java.nio.file.
Java scoops up command line arguments you dish out with the main method.
main
Java’s New I/O (NIO) package (java.nio.file) provides a more versatile approach for dealing with files.
Java provides a straightforward way to write to stderr using System.err.print() or System.err.println().
System.err.print()
System.err.println()