The prototype for one of the FileInputStream constructors is: public FileInputStream(String name) throws FileNotFoundException Unlike C or C++ prototypes, Java methods and constructors must ...

See also: NullPointerException in Java – Explaining the Billion Dollar Mistake A good example would be the FileNotFoundException ... might understandably throw an exception.

For example, if a developer tries to access a file, the Java IO library forces them to deal with the checked FileNotFoundException ... the forName() method may never actually throw a ...