Java FileNotFoundException is an exception thrown when an attempt to open a file fails because the file does not exist or the path is incorrect. It is a subclass of Java IOException and is typically encountered when working with file I/O operations. Introduced in Java 1995 with Java 1.0, FileNotFoundException is commonly handled in Java applications that perform file reading or writing tasks, allowing for graceful error handling when files are missing or not accessible.

https://docs.oracle.com/javase/8/docs/api/java/io/FileNotFoundException.html