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Java Input and Output Streams

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The package do contain two classes, the InputStream and the OutputStream, from which most of the other classes in package derive.

A D V E R T I S E M E N T package contains many subclasses of the InputStream and OutputStream which implements the specific input or output function. Consider for example, FileInputStream and FileOutputStream are the input and output streams which operates a file on the native file system

Overview of the's Input and Output Streams

InputStream class is an abstract base class which do provides the minimal programming interface and partial implementation of the input streams in Java. The InputStream defines the methods to read bytes or the arrays of bytes, marking the locations in stream, skipping the bytes of input, finding out the number of bytes which are available for reading, and resetting current position within the stream. The input stream is automatically opened when we create it. we can explicitly close the stream with the method close(), or let it be closed implicitly when a object is garbage collected.

OutputStream class is the abstract base class which provides minimal programming interface and the partial implementation of the output stream in Java. the OutputStream defines methods for writing the bytes or arrays of bytes to stream and flushing the stream. The output stream is automatically opened when we create it. We can explicitly close the output stream using close() method, or let it be closed implicitly when an object is garbage collected.

A Simple Input and Output Streams

Following is an overview of input and output streams, classes which inherits directly from the InputStream and the OutputStream which are not abstract classes.

FileInputStream and FileOutputStream
Used to read the data from or write the data to the file on a native file system.
PipedInputStream and PipedOutputStream
Implements input and output components of a pipe. Pipes are used to channel the output from one program into an input of another. The PipedInputStream must be connected to the PipedOutputStream and vice versa.
ByteArrayInputStream and ByteArrayOutputStream
Reads the data from or writes the data to byte array in memory.
Concatenates the multiple input streams into one input stream.
Allows the programs to read from StringBuffer as if it is an input stream.

The Filtered Streams

The FilterInputStream and FilterOutputStream are subclasses of the InputStream and OutputStream respectively, and both are abstract classes. These classes will define interface for the filtered streams. Filtered streams processes the data as it is being read or written. Consider for example, BufferedInputStream and BufferedOutputStream classes buffer data while reading and writing to speed it up.

DataInputStream and DataOutputStream
Reads or writes the primitive Java data types in machine independent format.
BufferedInputStream and BufferedOutputStream
This is an efficient stream which buffers data while reading or writing.
The input stream which keeps the track of line numbers while reading.
The Input stream with one-byte pushback buffer.
An output stream with a convenient printing methods.

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Keywords: Package, Streams to Implement Pipes

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