IOException

extends Exception

java.lang.Object
↳	java.lang.Throwable
	↳	java.lang.Exception
		↳	java.io.IOException

Known Direct Subclasses

AppletIOException, CEFormatException, CEStreamExhausted, ChangedCharSetException, CharConversionException, ClosedConnectionException, EOFException, FileNotFoundException, FtpProtocolException, HttpRetryException, IIOException, InterruptedIOException, InvalidDataException, InvalidPropertiesFormatException, JMXProviderException, and 20 others.

AppletIOException	An applet IO exception.
CEFormatException
CEStreamExhausted	This exception is thrown when EOF is reached
ChangedCharSetException	ChangedCharSetException as the name indicates is an exception thrown when the charset is changed.
CharConversionException	Base class for character conversion exceptions.
ClosedConnectionException	This exception may be thrown as a result of an asynchronous close of a `Connection` while an I/O operation is in progress.
EOFException	Signals that an end of file or end of stream has been reached unexpectedly during input.
FileNotFoundException	Signals that an attempt to open the file denoted by a specified pathname has failed.
FtpProtocolException	This exeception is thrown when unexpected results are returned during an FTP session.
HttpRetryException	Thrown to indicate that a HTTP request needs to be retried but cannot be retried automatically, due to streaming mode being enabled.
IIOException	An exception class used for signaling run-time failure of reading and writing operations.
InterruptedIOException	Signals that an I/O operation has been interrupted.
InvalidDataException	This exception is used when a file contains illegal or unexpected data.
InvalidPropertiesFormatException	Thrown to indicate that an operation could not complete because the input did not conform to the appropriate XML document type for a collection of properties, as per the `Properties` specification.
JMXProviderException	Exception thrown by `JMXConnectorFactory` and `JMXConnectorServerFactory` when a provider exists for the required protocol but cannot be used for some reason.
JMXServerErrorException	Exception thrown as the result of a remote `MBeanServer` method invocation when an `Error` is thrown while processing the invocation in the remote MBean server.
JarException
MalformedURLException	Thrown to indicate that a malformed URL has occurred.
ObjectStreamException	Superclass of all exceptions specific to Object Stream classes.
PNGImageDecoder.PNGException
ParsingException
ProtocolException	Thrown to indicate that there is an error in the underlying protocol, such as a TCP error.
RemoteException	A `RemoteException` is the common superclass for a number of communication-related exceptions that may occur during the execution of a remote method call.
SSLException	Indicates some kind of error detected by an SSL subsystem.
SaslException	This class represents an error that has occurred when using SASL.
SmtpProtocolException	This exeception is thrown when unexpected results are returned during an SMTP session.
SocketException	Thrown to indicate that there is an error creating or accessing a Socket.
SyncFailedException	Signals that a sync operation has failed.
TelnetProtocolException	An unexpected result was received by the client when talking to the telnet server.
TransportTimeoutException	This exception may be thrown as a result of a timeout when attaching to a target VM, or waiting to accept a connection from a target VM.
UTFDataFormatException	Signals that a malformed string in modified UTF-8 format has been read in a data input stream or by any class that implements the data input interface.
UnknownHostException	Thrown to indicate that the IP address of a host could not be determined.
UnknownServiceException	Thrown to indicate that an unknown service exception has occurred.
UnsupportedEncodingException	The Character Encoding is not supported.
ZipException	Signals that a Zip exception of some sort has occurred.

Known Indirect Subclasses

AccessException, ActivateFailedException, AuthenticationException, BindException, ConnectException, ConnectIOException, ConnectionResetException, ConversionBufferFullException, ExportException, FtpLoginException, IIOInvalidTreeException, InvalidClassException, InvalidFormatException, InvalidObjectException, JarException, and 29 others.

AccessException	An `AccessException` is thrown by certain methods of the `java.rmi.Naming` class (specifically `bind`, `rebind`, and `unbind`) and methods of the `java.rmi.activation.ActivationSystem` interface to indicate that the caller does not have permission to perform the action requested by the method call.
ActivateFailedException	This exception is thrown by the RMI runtime when activation fails during a remote call to an activatable object.
AuthenticationException	This exception is thrown by a SASL mechanism implementation to indicate that the SASL exchange has failed due to reasons related to authentication, such as an invalid identity, passphrase, or key.
BindException	Signals that an error occurred while attempting to bind a socket to a local address and port.
ConnectException	Signals that an error occurred while attempting to connect a socket to a remote address and port.
ConnectIOException	A `ConnectIOException` is thrown if an `IOException` occurs while making a connection to the remote host for a remote method call.
ConnectionResetException	Thrown to indicate a connection reset.
ConversionBufferFullException	This class is deprecated. Replaced by `java.nio.charset`. THIS API WILL BE REMOVED IN J2SE 1.6.
ExportException	An `ExportException` is a `RemoteException` thrown if an attempt to export a remote object fails.
FtpLoginException	This exception is thrown when an error is encountered during an FTP login operation.
IIOInvalidTreeException	An `IIOInvalidTreeException` is thrown when an attempt by an `IIOMetadata` object to parse a tree of `IIOMetadataNode`s fails.
InvalidClassException	Thrown when the Serialization runtime detects one of the following problems with a Class.
InvalidFormatException	This exception is used when a reader is used to read file of a format it doesn't unterstand or support.
InvalidObjectException	Indicates that one or more deserialized objects failed validation tests.
JarException	Signals that an error of some sort has occurred while reading from or writing to a JAR file.
MalformedInputException	Checked exception thrown when an input byte sequence is not legal for given charset, or an input character sequence is not a legal sixteen-bit Unicode sequence.
MarshalException	A `MarshalException` is thrown if a `java.io.IOException` occurs while marshalling the remote call header, arguments or return value for a remote method call.
NoRouteToHostException	Signals that an error occurred while attempting to connect a socket to a remote address and port.
NoSuchObjectException	A `NoSuchObjectException` is thrown if an attempt is made to invoke a method on an object that no longer exists in the remote virtual machine.
NotActiveException	Thrown when serialization or deserialization is not active.
NotSerializableException	Thrown when an instance is required to have a Serializable interface.
OptionalDataException	Exception indicating the failure of an object read operation due to unread primitive data, or the end of data belonging to a serialized object in the stream.
PortUnreachableException	Signals that an ICMP Port Unreachable message has been received on a connected datagram.
RIFFInvalidDataException	This exception is used when a RIFF file contains illegal or unexpected data.
RIFFInvalidFormatException	This exception is used when a reader is used to read RIFF file of a format it doesn't unterstand or support.
SSLHandshakeException	Indicates that the client and server could not negotiate the desired level of security.
SSLKeyException	Reports a bad SSL key.
SSLPeerUnverifiedException	Indicates that the peer's identity has not been verified.
SSLProtocolException	Reports an error in the operation of the SSL protocol.
ServerError	A `ServerError` is thrown as a result of a remote method invocation when an `Error` is thrown while processing the invocation on the server, either while unmarshalling the arguments, executing the remote method itself, or marshalling the return value.
ServerException	A `ServerException` is thrown as a result of a remote method invocation when a `RemoteException` is thrown while processing the invocation on the server, either while unmarshalling the arguments or executing the remote method itself.
ServerRuntimeException	This class is deprecated. no replacement
SkeletonMismatchException	This class is deprecated. no replacement. Skeletons are no longer required for remote method calls in the Java 2 platform v1.2 and greater.
SkeletonNotFoundException	This class is deprecated. no replacement. Skeletons are no longer required for remote method calls in the Java 2 platform v1.2 and greater.
SocketSecurityException	An obsolete subclass of `ExportException`.
SocketTimeoutException	Signals that a timeout has occurred on a socket read or accept.
StreamCorruptedException	Thrown when control information that was read from an object stream violates internal consistency checks.
StubNotFoundException	A `StubNotFoundException` is thrown if a valid stub class could not be found for a remote object when it is exported.
UnexpectedException	An `UnexpectedException` is thrown if the client of a remote method call receives, as a result of the call, a checked exception that is not among the checked exception types declared in the `throws` clause of the method in the remote interface.
UnknownCharacterException	This class is deprecated. Replaced by `java.nio.charset`. THIS API WILL BE REMOVED IN J2SE 1.6.
UnknownHostException	An `UnknownHostException` is thrown if a `java.net.UnknownHostException` occurs while creating a connection to the remote host for a remote method call.
UnmappableCharacterException	Checked exception thrown when an input character (or byte) sequence is valid but cannot be mapped to an output byte (or character) sequence.
UnmarshalException	An `UnmarshalException` can be thrown while unmarshalling the parameters or results of a remote method call if any of the following conditions occur: if an exception occurs while unmarshalling the call header if the protocol for the return value is invalid if a `java.io.IOException` occurs unmarshalling parameters (on the server side) or the return value (on the client side).
WriteAbortedException	Signals that one of the ObjectStreamExceptions was thrown during a write operation.

Class Overview

Signals that an I/O exception of some sort has occurred. This class is the general class of exceptions produced by failed or interrupted I/O operations.

Summary

Public Constructors
	IOException() Constructs an `IOException` with `null` as its error detail message.
	IOException(String message) Constructs an `IOException` with the specified detail message.
	IOException(String message, Throwable cause) Constructs an `IOException` with the specified detail message and cause.
	IOException(Throwable cause) Constructs an `IOException` with the specified cause and a detail message of `(cause==null ? null : cause.toString())` (which typically contains the class and detail message of `cause`).

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Inherited Methods

From class java.lang.Throwable

From class java.lang.Object

Object	clone() Creates and returns a copy of this object.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
void	finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
final Class<?>	getClass() Returns the runtime class of this `Object`.
int	hashCode() Returns a hash code value for the object.
final void	notify() Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll() Wakes up all threads that are waiting on this object's monitor.
String	toString() Returns a string representation of the object.
final void	wait() Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
final void	wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
final void	wait(long timeout) Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.

Public Constructors

public IOException ()

Constructs an IOException with null as its error detail message.

public IOException (String message)

Constructs an IOException with the specified detail message.

Parameters

message	The detail message (which is saved for later retrieval by the `getMessage()` method)

public IOException (String message, Throwable cause)

Constructs an IOException with the specified detail message and cause.

Note that the detail message associated with cause is not automatically incorporated into this exception's detail message.

Parameters

message	The detail message (which is saved for later retrieval by the `getMessage()` method)
cause	The cause (which is saved for later retrieval by the `getCause()` method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)

public IOException (Throwable cause)

Constructs an IOException with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause). This constructor is useful for IO exceptions that are little more than wrappers for other throwables.

Parameters

cause	The cause (which is saved for later retrieval by the `getCause()` method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)

Interfaces

Classes

Exceptions

Errors

IOException

Class Overview

See Also

Summary

Public Constructors

public IOException ()

public IOException (String message)

Parameters

public IOException (String message, Throwable cause)

Parameters

public IOException (Throwable cause)

Parameters