package

java.io

Classes | Description

Provides input and output facilities by means of streaming, filesystem access and serialization. more...

Interfaces

Closeable	Closeable represents the source or destination of some data which can be called its close method to release resources it holds.
DataInput	DataInput is an interface which declares methods for reading in typed data from a Stream.
DataOutput	DataOutput is an interface which declares methods for writing typed data to a Stream.
Externalizable	Objects that want to be serialized/deserialized using ObjectOutputStream/ObjectInputStream but defining their own byte representation should implement this interface.
FileFilter	FileFilter is an interface for filtering abstract Files
FilenameFilter	FilenameFilter is an interface which declares methods for filtering file names in the `list` method of File.
Flushable	Indicates that an output object can be flushed.
ObjectInput	Streams to be used with serialization to read objects must implement this interface.
ObjectInputValidation	Objects to perform validations on other objects read with serialization should implement this interface.
ObjectOutput	Streams to be used with serialization to write objects must implement this interface.
ObjectStreamConstants	Helper interface with constants used by the serialization implementation.
Serializable	Objects that want to be serialized/deserialized using ObjectOutputStream/ObjectInputStream should implement this interface.

Classes

BufferedInputStream	`BufferedInputStream` is a class which takes an input stream and buffers the input.
BufferedOutputStream	BufferedOutputStream is a class which takes an output stream and buffers the writes to that stream.
BufferedReader	BufferedReader is a buffered character input reader.
BufferedWriter	BufferedWriter is for writing buffered character output.
ByteArrayInputStream	ByteArrayInputStream is used for streaming over a byte array.
ByteArrayOutputStream	ByteArrayOutputStream is a class whose underlying stream is represented by a byte array.
CharArrayReader	CharArrayReader is used as a buffered character input stream on a character array.
CharArrayWriter	CharArrayWriter is used as a character output stream on a character array.
DataInputStream	DataInputStream is a filter class which can read typed data from a Stream.
DataOutputStream	DataOutputStream is a filter class which can write typed data to a Stream.
File	File is a class which represents a file name or directory.
FileDescriptor	FileDescriptor is the lowest level representation of a File, Device, or Socket.
FileInputStream	FileInputStream is a class for reading bytes from a file.
FileOutputStream	FileOutputStream is a class whose underlying stream is represented by a file in the operating system.
FilePermission	The class FilePermission is responsible for granting access to files or directories.
FileReader	FileReader is class for turning a file into a character Stream.
FileWriter	FileWriter is a class for writing characters out to a file.
FilterInputStream	FilteredInputStream is a class which takes an input stream and filters the input in some way.
FilterOutputStream	FilteredOutputStream is a class which takes an output stream and filters the output in some way.
FilterReader	FilterReader is a class which takes a Reader and filters the input in some way.
FilterWriter	FilterWriter is a class which takes a Writer and filters the output in some way.
InputStream	InputStream is an abstract class for all byte input streams.
InputStreamReader	InputStreamReader is class for turning a byte Stream into a character Stream.
LineNumberInputStream	This class is deprecated. Use LineNumberReader
LineNumberReader	LineNumberReader is a buffered character input reader which counts line numbers as data is being read.
ObjectInputStream	An ObjectInputStream can be used to load Java objects from a stream where the objects were saved using an ObjectOutputStream.
ObjectInputStream.GetField	Inner class to provide access to serializable fields
ObjectOutputStream	An ObjectOutputStream can be used to save Java objects into a stream where the objects can be loaded later with an ObjectInputStream.
ObjectOutputStream.PutField	Inner class to provide access to serializable fields
ObjectStreamClass	Instances of ObjectStreamClass are used to describe classes of objects used by serialization.
ObjectStreamField	This class represents object fields that are saved to the stream, by serialization.
OutputStream	OutputStream is an abstract class for all byte output streams.
OutputStreamWriter	OutputStreamWriter is a class for turning a character output stream into a byte output stream.
PipedInputStream	PipedInputStream is a class which receives information on a communications pipe.
PipedOutputStream	PipedOutputStream is a class which places information on a communications pipe.
PipedReader	PipedReader is a class which receives information on a communications pipe.
PipedWriter	PipedWriter is a class which places information on a communications pipe.
PrintStream	PrintStream is a class which takes an OutputStream and provides convenience methods for printing common data types in a human readable format on the stream.
PrintWriter	PrintWriter is a class which takes either an OutputStream or Writer and provides convenience methods for printing common data types in a human readable format on the stream.
PushbackInputStream	PushbackInputStream is a filter class which allows bytes read to be pushed back into the stream so that they can be reread.
PushbackReader	PushbackReader is a filter class which allows chars read to be pushed back into the stream so that they can be reread.
RandomAccessFile	RandomAccessFile is a class which allows positioning of the next read anywhere in the file.
Reader	Reader is an Abstract class for reading Character Streams.
SequenceInputStream	SequenceInputStream is used for streaming over a sequence of streams concatenated together.
SerializablePermission	SerializablePermission objects represent permission to access unsafe serialization operations.
StreamTokenizer	StreamTokenizer takes a stream and a set of tokens and parses them one at a time.
StringBufferInputStream	This class is deprecated. Use StringReader
StringReader	StringReader is used as a character input stream on a String.
StringWriter	StringWriter is an class for writing Character Streams to a StringBuffer.
Writer	Writer is an Abstract class for writing Character Streams.

Exceptions

CharConversionException	This is the top level class for character conversion exceptions.
EOFException	This End Of File (EOF) exception is thrown when a program encounters the end of a file or stream during an operation.
FileNotFoundException	This IO exception is thrown when a file specified by a program cannot be found.
InterruptedIOException	This IO exception is thrown when a program reading or writing to a stream is interrupted.
InvalidClassException	A problem was found with the class of one of the objects being serialized or deserialized.
InvalidObjectException	The object graph loaded (deserialized) can be validated by a collection of validator objects.
IOException	This IO exception is thrown when a program encounters some sort I/O error.
NotActiveException	Some methods in ObjectInputStream and ObjectOutputStream can only be called from a nested call to readObject() or writeObject().
NotSerializableException	When an implementation of ObjectOutput.writeObject() is passed an object that is not serializable, it will throw this type of exception.
ObjectStreamException	This is the superclass of all exceptions that can happen when serializing or deserialing objects.
OptionalDataException	When readObject() encounters primitive types (int, char, etc) instead of an object instance in the input stream, this type of exception will be thrown.
StreamCorruptedException	When readObject() cannot read an object from the input stream due to missing information (cyclic reference that doesn't match previous instance or missing class descriptor for instance to be loaded) this type of exception is thrown.
SyncFailedException	This IO exception is thrown when the method `sync()` in FileDescriptor failed to complete.
UnsupportedEncodingException	This IO exception is thrown when a program asks for a particular character converter and it is not available.
UTFDataFormatException	This IO exception is thrown when a program attempts to read a UTF-8 String and the encoding is incorrect.
WriteAbortedException	This type of exception is thrown by readObject() when it detects an exception marker in the input stream.

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