java.io

A BufferedInputStream adds functionality to another input stream-namely, the ability to buffer the input and to support the mark and reset methods.

The class implements a buffered output stream.

Reads text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines.

Writes text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings.

A ByteArrayInputStream contains an internal buffer that contains bytes that may be read from the stream.

This class implements an output stream in which the data is written into a byte array.

This class implements a character buffer that can be used as a character-input stream.

This class implements a character buffer that can be used as an Writer.

Methods to access the character-based console device, if any, associated with the current Java virtual machine.

A data input stream lets an application read primitive Java data types from an underlying input stream in a machine-independent way.

A data output stream lets an application write primitive Java data types to an output stream in a portable way.

An abstract representation of file and directory pathnames.

Instances of the file descriptor class serve as an opaque handle to the underlying machine-specific structure representing an open file, an open socket, or another source or sink of bytes.

A FileInputStream obtains input bytes from a file in a file system.

A file output stream is an output stream for writing data to a File or to a FileDescriptor.

Legacy security code; do not use.

Convenience class for reading character files.

Convenience class for writing character files.

A FilterInputStream contains some other input stream, which it uses as its basic source of data, possibly transforming the data along the way or providing additional functionality.

This class is the superclass of all classes that filter output streams.

Abstract class for reading filtered character streams.

Abstract class for writing filtered character streams.

This abstract class is the superclass of all classes representing an input stream of bytes.

An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified .

This class is an input stream filter that provides the added functionality of keeping track of the current line number.

A buffered character-input stream that keeps track of line numbers.

An ObjectInputStream deserializes primitive data and objects previously written using an ObjectOutputStream.

An ObjectOutputStream writes primitive data types and graphs of Java objects to an OutputStream.

Serialization's descriptor for classes.

A description of a Serializable field from a Serializable class.

This abstract class is the superclass of all classes representing an output stream of bytes.

An OutputStreamWriter is a bridge from character streams to byte streams: Characters written to it are encoded into bytes using a specified .

A piped input stream should be connected to a piped output stream; the piped input stream then provides whatever data bytes are written to the piped output stream.

A piped output stream can be connected to a piped input stream to create a communications pipe.

Piped character-input streams.

Piped character-output streams.

A PrintStream adds functionality to another output stream, namely the ability to print representations of various data values conveniently.

Prints formatted representations of objects to a text-output stream.

A PushbackInputStream adds functionality to another input stream, namely the ability to "push back" or "unread" one byte.

A character-stream reader that allows characters to be pushed back into the stream.

Instances of this class support both reading and writing to a random access file.

Abstract class for reading character streams.

A SequenceInputStream represents the logical concatenation of other input streams.

This legacy security is not supported on Android.

The StreamTokenizer class takes an input stream and parses it into "tokens", allowing the tokens to be read one at a time.

This class allows an application to create an input stream in which the bytes read are supplied by the contents of a string.

A character stream whose source is a string.

A character stream that collects its output in a string buffer, which can then be used to construct a string.

Abstract class for writing to character streams.

Base class for character conversion exceptions.

Signals that an end of file or end of stream has been reached unexpectedly during input.

Signals that an attempt to open the file denoted by a specified pathname has failed.

Signals that an I/O operation has been interrupted.

Thrown when the Serialization runtime detects one of the following problems with a Class.

Indicates that one or more deserialized objects failed validation tests.

Thrown when a serious I/O error has occurred.

Signals that an I/O exception of some sort has occurred.

Thrown when serialization or deserialization is not active.

Thrown when an instance is required to have a Serializable interface.

Superclass of all exceptions specific to Object Stream classes.

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.

Thrown when control information that was read from an object stream violates internal consistency checks.

Signals that a sync operation has failed.

Wraps an IOException with an unchecked exception.

The Character Encoding is not supported.

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.

Signals that one of the ObjectStreamExceptions was thrown during a write operation.