ByteStreams And CharacterStreams
A steam can represent many different kinds of sources and
destinations including disk file, device, other program and memory arrays. An I/o
stream represents an source or an output destination. Stream support many kind of data including a simple bytes, primitive
data types, localized characters, and objects. Some Streams simply pass on data,
other manipulation and transform the data in useful ways.
No matter how they work internally all
streams present the same simple model to program that use them :a stream is a
sequence of data.
Program use byte streams to perform input and output of 8-bit bytes.all byte
stream classes are descended from inputStream or outputStream. there are many
byte stream classes. To demonstrate how byte stream work, we will focus on the
file I/O byte streams,FileInputStream and FileOutputStream. Other kind of Byte
Stream are used much the way ;they differ mainly in the way they are
constructed.
Example of Byte Streams
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class MyByteStream
{
public static void main(String arg[]) throws
IOException
{
FileInputStream fin=null;
FileOutputStream fout=null;
try
{
fin=new
FileInputStream("input.txt");
fout=new
FileOutputStream("output.txt");
int c;
while((c=fin.read())!=-1)
{
fout.write(c);
}
}
finally
{
if(fin!=null)
{
fin.close();
}
if(fout!=null)
{
fout.close();
}
}
}
}
Output
Before compilation the output file is blank but after compilation the content of input file copy into the output.
![byteStreamfile.gif]()
![ByteStreamcmd.gif]()
After compilation all the content input file you can see in the output file.In this program we are using ByteStream.
![byteAftercompile.gif]()
Character Streams
All character Stream classes are descended from Reader and Writer. As with
Byte streams there are character stream classes that specialize in File I/O:FileReader
and FileWriter.
Example
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class MyCharacterStream
{
public static void main(String arg[])
throws IOException
{
FileReader
fin=null;
FileWriter
fout=null;
try
{
fin=new FileReader("input.txt");
fout=new FileWriter("output.txt");
int c;
while((c=fin.read())!=-1)
{
fout.write(c);
}
}
finally
{
if(fin!=null)
{
fin.close();
}
if(fout!=null)
{
fout.close();
}
}
}
}
Output
Before compilation initial state of input output file. The output File is initially blank.
![CHARACTERSTREAM.gif]()
![Mycharacterstreamcmd.gif]()
After compilation all the content of input file is copying in to the output file.In this copy program we are using character stream.
![CHARCTERSTREAMAFTER.gif]()
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