FileSystemException

AI-generated Key Takeaways

• FileSystemException is a checked exception indicating a failure in a file system operation, extending IOException.

• It provides constructors to specify the file(s) involved and an optional reason for the failure.

• Methods like getFile(), getOtherFile(), and getReason() offer details about the exception.

• Several specific file system exceptions like NoSuchFileException and AccessDeniedException are subclasses of FileSystemException.

public class FileSystemException extends IOException

Known Direct Subclasses AccessDeniedException, AtomicMoveNotSupportedException, DirectoryNotEmptyException, FileAlreadyExistsException, FileSystemLoopException, NoSuchFileException, NotDirectoryException, NotLinkException AccessDeniedException Checked exception thrown when a file system operation is denied, typically due to a file permission or other access check.  AtomicMoveNotSupportedException Checked exception thrown when a file cannot be moved as an atomic file system operation.  DirectoryNotEmptyException Checked exception thrown when a file system operation fails because a directory is not empty.  FileAlreadyExistsException Checked exception thrown when an attempt is made to create a file or directory and a file of that name already exists.  FileSystemLoopException Checked exception thrown when a file system loop, or cycle, is encountered.  NoSuchFileException Checked exception thrown when an attempt is made to access a file that does not exist.  NotDirectoryException Checked exception thrown when a file system operation, intended for a directory, fails because the file is not a directory.  NotLinkException Checked exception thrown when a file system operation fails because a file is not a symbolic link.

Thrown when a file system operation fails on one or two files. This class is the general class for file system exceptions.

Public Constructor Summary

	FileSystemException(String file) Constructs an instance of this class.
	FileSystemException(String file, String other, String reason) Constructs an instance of this class.

Public Method Summary

String	getFile() Returns the file used to create this exception.
String	getMessage() Returns the detail message string.
String	getOtherFile() Returns the other file used to create this exception.
String	getReason() Returns the string explaining why the file system operation failed.

Inherited Method Summary

From class java.lang.Throwable

synchronized final void	addSuppressed(Throwable exception) Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.
synchronized Throwable	fillInStackTrace() Fills in the execution stack trace.
synchronized Throwable	getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown.
String	getLocalizedMessage() Creates a localized description of this throwable.
String	getMessage() Returns the detail message string of this throwable.
StackTraceElement[]	getStackTrace() Provides programmatic access to the stack trace information printed by printStackTrace().
synchronized final Throwable[]	getSuppressed() Returns an array containing all of the exceptions that were suppressed, typically by the try-with-resources statement, in order to deliver this exception.
synchronized Throwable	initCause(Throwable cause) Initializes the cause of this throwable to the specified value.
void	printStackTrace() Prints this throwable and its backtrace to the standard error stream.
void	printStackTrace(PrintWriter s) Prints this throwable and its backtrace to the specified print writer.
void	printStackTrace(PrintStream s) Prints this throwable and its backtrace to the specified print stream.
void	setStackTrace(StackTraceElement[] stackTrace) Sets the stack trace elements that will be returned by getStackTrace() and printed by printStackTrace() and related methods.
String	toString() Returns a short description of this throwable.

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

Public Constructors

public FileSystemException (String file)

Constructs an instance of this class. This constructor should be used when an operation involving one file fails and there isn't any additional information to explain the reason.

Parameters

file	a string identifying the file or null if not known.

public FileSystemException (String file, String other, String reason)

Constructs an instance of this class. This constructor should be used when an operation involving two files fails, or there is additional information to explain the reason.

Parameters

file	a string identifying the file or null if not known.
other	a string identifying the other file or null if there isn't another file or if not known
reason	a reason message with additional information or null

Public Methods

public String getFile ()

Returns the file used to create this exception.

Returns

• the file (can be null)

public String getMessage ()

Returns the detail message string.

Returns

• the detail message string of this Throwable instance (which may be null).

public String getOtherFile ()

Returns the other file used to create this exception.

Returns

• the other file (can be null)

public String getReason ()

Returns the string explaining why the file system operation failed.

Returns

• the string explaining why the file system operation failed