Package java.io

Interface Summary

Interface	Description
Closeable	An AutoCloseable whose close method may throw an IOException.
DataInput	Defines an interface for classes that are able to read big-endian typed data from some source.
DataOutput	Defines an interface for classes that are able to write big-endian typed data to some target.
Externalizable	Defines an interface for classes that want to be serializable, but have their own binary representation.
FileFilter	An interface for filtering File objects based on their names or other information.
FilenameFilter	An interface for filtering File objects based on their names or the directory they reside in.
Flushable	Defines an interface for classes that can (or need to) be flushed, typically before some output processing is considered to be finished and the object gets closed.
ObjectInput	Defines an interface for classes that allow reading serialized objects.
ObjectInputValidation	A callback interface for post-deserialization checks on objects.
ObjectOutput	Defines an interface for classes that allow reading serialized objects.
ObjectStreamConstants	A helper interface with constants used by the serialization implementation.
Serializable	Marks classes that can be serialized by ObjectOutputStream and deserialized by ObjectInputStream.

Class Summary

Class	Description
BufferedInputStream	Wraps an existing InputStream and buffers the input.
BufferedOutputStream	Wraps an existing OutputStream and buffers the output.
BufferedReader	Wraps an existing Reader and buffers the input.
BufferedWriter	Wraps an existing Writer and buffers the output.
ByteArrayInputStream	A specialized InputStream for reading the contents of a byte array.
ByteArrayOutputStream	A specialized OutputStream for class for writing content to an (internal) byte array.
CharArrayReader	A specialized Reader for reading the contents of a char array.
CharArrayWriter	A specialized Writer for class for writing content to an (internal) char array.
Console	Provides access to the console, if available.
DataInputStream	Wraps an existing InputStream and reads big-endian typed data from it.
DataOutputStream	Wraps an existing OutputStream and writes big-endian typed data to it.
File	An "abstract" representation of a file system entity identified by a pathname.
FileDescriptor	Wraps a Unix file descriptor.
FileInputStream	An input stream that reads bytes from a file.
FileOutputStream	An output stream that writes bytes to a file.
FilePermission	Legacy security code; do not use.
FileReader	A specialized Reader that reads from a file in the file system.
FileWriter	A specialized Writer that writes to a file in the file system.
FilterInputStream	Wraps an existing InputStream and performs some transformation on the input data while it is being read.
FilterOutputStream	Wraps an existing OutputStream and performs some transformation on the output data while it is being written.
FilterReader	Wraps an existing Reader and performs some transformation on the input data while it is being read.
FilterWriter	Wraps an existing Writer and performs some transformation on the output data while it is being written.
InputStream	A readable source of bytes.
InputStreamReader	A class for turning a byte stream into a character stream.
LineNumberInputStream	Deprecated. Use LineNumberReader instead.
LineNumberReader	Wraps an existing Reader and counts the line terminators encountered while reading the data.
ObjectInputStream	A specialized InputStream that is able to read (deserialize) Java objects as well as primitive data types (int, byte, char etc.).
ObjectInputStream.GetField	GetField is an inner class that provides access to the persistent fields read from the source stream.
ObjectOutputStream	A specialized OutputStream that is able to write (serialize) Java objects as well as primitive data types (int, byte, char etc.).
ObjectOutputStream.PutField	PutField is an inner class to provide access to the persistent fields that are written to the target stream.
ObjectStreamClass	Represents a descriptor for identifying a class during serialization and deserialization.
ObjectStreamField	Describes a field for the purpose of serialization.
OutputStream	A writable sink for bytes.
OutputStreamWriter	A class for turning a character stream into a byte stream.
PipedInputStream	Receives information from a communications pipe.
PipedOutputStream	Places information on a communications pipe.
PipedReader	Receives information on a communications pipe.
PipedWriter	Places information on a communications pipe.
PrintStream	Wraps an existing OutputStream and provides convenience methods for writing common data types in a human readable format.
PrintWriter	Wraps either an existing OutputStream or an existing Writer and provides convenience methods for printing common data types in a human readable format.
PushbackInputStream	Wraps an existing InputStream and adds functionality to "push back" bytes that have been read, so that they can be read again.
PushbackReader	Wraps an existing Reader and adds functionality to "push back" characters that have been read, so that they can be read again.
RandomAccessFile	Allows reading from and writing to a file in a random-access manner.
Reader	The base class for all readers.
SequenceInputStream	Concatenates two or more existing InputStreams.
SerializablePermission	Legacy security code; do not use.
StreamTokenizer	Parses a stream into a set of defined tokens, one at a time.
StringBufferInputStream	Deprecated. Use StringReader instead.
StringReader	A specialized Reader that reads characters from a String in a sequential manner.
StringWriter	A specialized Writer that writes characters to a StringBuffer in a sequential manner, appending them in the process.
Writer	The base class for all writers.

Exception Summary

Exception	Description
CharConversionException	The top level class for character conversion exceptions.
EOFException	Thrown when a program encounters the end of a file or stream during an input operation.
FileNotFoundException	Thrown when a file specified by a program cannot be found.
InterruptedIOException	Signals that a blocking I/O operation has been interrupted.
InvalidClassException	Signals a problem during the serialization or or deserialization of an object.
InvalidObjectException	Signals that, during deserialization, the validation of an object has failed.
IOException	Signals a general, I/O-related error.
NotActiveException	Signals that a serialization-related method has been invoked in the wrong place.
NotSerializableException	Signals that an object that is not serializable has been passed into the ObjectOutput.writeObject() method.
ObjectStreamException	Signals some sort of problem during either serialization or deserialization of objects.
OptionalDataException	Signals that the ObjectInputStream class encountered a primitive type (int, char etc.) instead of an object instance in the input stream.
StreamCorruptedException	Signals that the ObjectInputStream.readObject() method could not read an object due to missing information (for example, a cyclic reference that doesn't match a previous instance, or a missing class descriptor for the object to be loaded).
SyncFailedException	Signals that the FileDescriptor.sync() method has failed to complete.
UnsupportedEncodingException	Thrown when a program asks for a particular character converter that is unavailable.
UTFDataFormatException	Signals that an incorrectly encoded UTF-8 string has been encountered, most likely while reading some DataInputStream.
WriteAbortedException	Signals that the ObjectInputStream.readObject() method has detected an exception marker in the input stream.

Error Summary

Error	Description
IOError	This error is thrown when a severe I/O error has happened.