Byte I/O Operations (Stream) in java
Programs use byte streams to perform input and output of 8-bit bytes.
All byte stream classes are descended from this two class:
All streams are from the Java IO package.
All other stream types are built on byte streams.
| Stream | Operations | Logical Unit | Description |
|---|---|---|---|
| FileInputStream | Read | Byte | A FileInputStream read one byte at a time. |
| FileOutputStream | Write | Byte | A file output stream write to a File or to a FileDescriptor one byte at a time. |
FileInputStream and FileOutputStream use an int variable to read to and write from.
in = new FileInputStream(Parameters.FILE_PATH_READ);
int c = in.read();
It holds a byte value in its last 8 bits. (In character stream, the int holds a character in its last 16 bits).
| Stream | Operations | Logical Unit | Description |
|---|---|---|---|
| ByteArrayInputStream | Read | Buffer (ByteArray) | A ByteArrayInputStream contains an internal buffer that contains bytes that may be read from the stream. |
| ByteArrayOutputStream | Write | Buffer (ByteArray) | This class implements an output stream in which the data is written into a byte array. |
| BufferedInputStream | Read | Buffer (ByteArray) | A BufferedInputStream adds functionality on buffer streams-namely, the support the mark and reset methods. |
| BufferedOutputStream | Write | Buffer (ByteArray) | The class implements a buffered output stream. |
| Stream | Operations | Logical Unit | Description |
|---|---|---|---|
| PipedInputStream | Pipe Read | Na | 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. |
| PipedOutputStream | Pipe Write | Na | A piped output stream can be connected to a piped input stream to create a communications pipe. |
| Stream | Operations | Logical Unit | Description |
|---|---|---|---|
| RandomAccessFile | Pointer Read/Write | Byte of Array | Instances of this class support both reading and writing to a random access file. |
FileInputStream, FileOutputStream and RandomAccessFile can return a FileChannel for low-level I/O.
The channels class are from the Java NIO Package.