Introduction
Generally the output stream acts as a destination to the data. The Java.io ByteArrayOutputStream is the class used to write the bytes in the form of an array to stream. Through the byte array output stream the stream is enclose to change into a array bytes.
Description
In case of Java.io ByteArrayOutputStream the methods that are called after closing the stream only when no I/O exceptions occurred. The byte array output stream is subclass to the class called output stream.
Declaration
Java.io ByteArrayOutputStream class is declared below:
Public class ByteArrayOutputStream extends OutputStream Fields
Java.io ByteArrayOutputStream class fields are:
- Protected int Count : The field represents to the index to count input stream buffer after the last character.
- Protected byte [] bu : The field represents to the internal buffer where actually the data stored.
Table
| Constructor | Description |
|---|---|
| ByteArrayOutputStream () | The function of this constructor is to create the byte array output stream. |
| ByteAyyayInputStream ( int size) | The function of this constructor is to create the byte array output stream with represented size of buffer. |
Table
| Method | Description |
|---|---|
| void close () | The function of this method is to close the present stream and associated to input stream systems resources are released without any impact. |
| void write (int b) | The function of this method is to write the represented byte into output stream. |
| void write (byte[] b, int off, int n) | By using this method it writes the data up to 'n' bytes from the output stream to an array of bytes. |
| void writeTo(Output stream out) | The function of this method is to write the entire data from this stream to the specified output stream. |
Description
From the following classes, methods are inherited to the byte array output stream class.
- Java.io.object
- Java.io.OutputStream
Examples
Usage of void close() method.
[c]import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class ByteArrayOutputStream
{
public static void main(String[] args) throws IOException
{
byte[] buf = {65, 66, 67, 68};
ByteArrayOutputStream baos = null;
try{
// creating a new Byte array output stream as below.
baos = new ByteArrayOutputStream();
// close method is invoked before baos.
baos.close();
// To write byte array to the output stream
baos.write(buf);
// print as in the form string
System.out.print(baos.toString());
}catch(Exception e){
// if I/O error occurs
e.printStackTrace();
}finally{
if(baos!=null)
baos.close();
}
}
}[/c]
Output
Following is the result will be displayed.
[c]ABCD[/c]
Usage of void writeTo (Outputstream out) method.
[c]import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class ByteArrayOutputStream
{
public static void main(String[] args) throws IOException
{
byte[] bs = {83, 80, 76, 69, 83, 83, 79, 78, 83};
OutputStream os = null;
ByteArrayOutputStream baos = null;
try{
// creating a new output stream
os = new ByteArrayOutputStream();
// creating a new ByteArrayOutputStream
baos = new ByteArrayOutputStream();
// writing the buffer to the byte array output stream
baos.write(bs);
// To write the output stream with baos
baos.writeTo(os);
// print the byte as default character set
System.out.println(os.toString());
}catch(Exception e)
{
// If any I/O error occurs
e.printStackTrace();
}finally
{
if(baos!=null)
baos.close();
if(os!=null)
os.close();
}
}
}[/c]
Output
Following is the result will be displayed.
[c]SPLESSONS[/c]
Key Points
- Generally the output stream acts as a destination to the data.
- The byte array output stream is the class used to write the bytes in the form of an array to stream. Through byte array output stream the stream is enclose to change into a array bytes.
- In case of byte array output stream the methods that are called after closing the stream only when no I/O exceptions occurred.