Creates a FileInputStream by opening a connection to an actual file, the file named by the File object file in the file system. A new FileDescriptor object is created to represent this file connection.

First, if there is a security manager, its checkRead method is called with the path represented by the file argument as its argument.

If the named file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading then a FileNotFoundException is thrown.

Parameters:

file the file to be opened for reading.

Exceptions:

FileNotFoundException if the file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading.

SecurityException if a security manager exists and its checkRead method denies read access to the file.

`FileNotFoundException`		if the file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading.
`SecurityException`		if a security manager exists and its `checkRead` method denies read access to the file.