Provides for system input and output through data streams,
serialization and the file system.
Unless otherwise noted, passing a null argument to a constructor or
method in any class or interface in this package will cause a
| Closeable |
A Closeable is a source or destination of data that can be closed.
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| DataInput |
The DataInput interface provides
for reading bytes from a binary stream and
reconstructing from them data in any of
the Java primitive types.
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| DataOutput |
The DataOutput interface provides
for converting data from any of the Java
primitive types to a series of bytes and
writing these bytes to a binary stream.
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| Externalizable |
Only the identity of the class of an Externalizable instance is
written in the serialization stream and it is the responsibility
of the class to save and restore the contents of its instances.
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| FileFilter |
A filter for abstract pathnames.
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| FilenameFilter |
Instances of classes that implement this interface are used to
filter filenames.
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| Flushable |
A Flushable is a destination of data that can be flushed.
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| ObjectInput |
ObjectInput extends the DataInput interface to include the reading of
objects.
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| ObjectInputValidation |
Callback interface to allow validation of objects within a graph.
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| ObjectOutput |
ObjectOutput extends the DataOutput interface to include writing of objects.
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| ObjectStreamConstants |
Constants written into the Object Serialization Stream.
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| Serializable |
Serializability of a class is enabled by the class implementing the
java.io.Serializable interface.
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| BufferedInputStream |
A BufferedInputStream adds
functionality to another input stream-namely,
the ability to buffer the input and to
support the mark and reset
methods.
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| BufferedOutputStream |
The class implements a buffered output stream.
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| BufferedReader |
Reads text from a character-input stream, buffering characters so as to
provide for the efficient reading of characters, arrays, and lines.
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| BufferedWriter |
Writes text to a character-output stream, buffering characters so as to
provide for the efficient writing of single characters, arrays, and strings.
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| ByteArrayInputStream |
A ByteArrayInputStream contains
an internal buffer that contains bytes that
may be read from the stream.
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| ByteArrayOutputStream |
This class implements an output stream in which the data is
written into a byte array.
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| CharArrayReader |
This class implements a character buffer that can be used as a
character-input stream.
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| CharArrayWriter |
This class implements a character buffer that can be used as an Writer.
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| Console |
Methods to access the character-based console device, if any, associated
with the current Java virtual machine.
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| DataInputStream |
A data input stream lets an application read primitive Java data
types from an underlying input stream in a machine-independent
way.
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| DataOutputStream |
A data output stream lets an application write primitive Java data
types to an output stream in a portable way.
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| File |
An abstract representation of file and directory pathnames.
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| FileDescriptor |
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.
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| FileInputStream |
A FileInputStream obtains input bytes
from a file in a file system.
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| FileOutputStream |
A file output stream is an output stream for writing data to a
File or to a FileDescriptor.
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| FilePermission |
Legacy security code; do not use.
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| FileReader |
Reads text from character files using a default buffer size.
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| FileWriter |
Writes text to character files using a default buffer size.
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| FilterInputStream |
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.
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| FilterOutputStream |
This class is the superclass of all classes that filter output
streams.
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| FilterReader |
Abstract class for reading filtered character streams.
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| FilterWriter |
Abstract class for writing filtered character streams.
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| InputStream |
This abstract class is the superclass of all classes representing
an input stream of bytes.
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| InputStreamReader |
An InputStreamReader is a bridge from byte streams to character streams: It
reads bytes and decodes them into characters using a specified charset.
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| LineNumberInputStream |
This class was deprecated
in API level 1.
This class incorrectly assumes that bytes adequately represent
characters. As of JDK 1.1, the preferred way to operate on
character streams is via the new character-stream classes, which
include a class for counting line numbers.
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| LineNumberReader |
A buffered character-input stream that keeps track of line numbers.
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| ObjectInputStream |
An ObjectInputStream deserializes primitive data and objects previously
written using an ObjectOutputStream.
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| ObjectInputStream.GetField |
Provide access to the persistent fields read from the input stream.
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| ObjectOutputStream |
An ObjectOutputStream writes primitive data types and graphs of Java objects
to an OutputStream.
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| ObjectOutputStream.PutField |
Provide programmatic access to the persistent fields to be written
to ObjectOutput.
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| ObjectStreamClass |
Serialization's descriptor for classes.
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| ObjectStreamField |
A description of a Serializable field from a Serializable class.
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| OutputStream |
This abstract class is the superclass of all classes representing
an output stream of bytes.
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| OutputStreamWriter |
An OutputStreamWriter is a bridge from character streams to byte streams:
Characters written to it are encoded into bytes using a specified charset.
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| PipedInputStream |
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.
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| PipedOutputStream |
A piped output stream can be connected to a piped input stream
to create a communications pipe.
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| PipedReader |
Piped character-input streams.
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| PipedWriter |
Piped character-output streams.
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| PrintStream |
A PrintStream adds functionality to another output stream,
namely the ability to print representations of various data values
conveniently.
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| PrintWriter |
Prints formatted representations of objects to a text-output stream.
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| PushbackInputStream |
A PushbackInputStream adds
functionality to another input stream, namely
the ability to "push back" or "unread" bytes,
by storing pushed-back bytes in an internal buffer.
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| PushbackReader |
A character-stream reader that allows characters to be pushed back into the
stream.
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| RandomAccessFile |
Instances of this class support both reading and writing to a
random access file.
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| Reader |
Abstract class for reading character streams.
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| SequenceInputStream |
A SequenceInputStream represents
the logical concatenation of other input
streams.
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| SerializablePermission |
This legacy security is not supported on Android.
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| StreamTokenizer |
The StreamTokenizer class takes an input stream and
parses it into "tokens", allowing the tokens to be
read one at a time.
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| StringBufferInputStream |
This class was deprecated
in API level 1.
This class does not properly convert characters into bytes. As
of JDK 1.1, the preferred way to create a stream from a
string is via the StringReader class.
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| StringReader |
A character stream whose source is a string.
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| StringWriter |
A character stream that collects its output in a string buffer, which can
then be used to construct a string.
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| Writer |
Abstract class for writing to character streams.
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