Java.io.ByteArrayOutputStream.write() Method

Description

The java.io.ByteArrayOutputStream.write(byte[] b, int off, int len) method converts the stream's contents using the specified charsetName. The malformed-input and unmappable-character sequences are replaced by the default replacement string for the platform's default character set.

Declaration

Following is the declaration for java.io.ByteArrayOutputStream.write(byte[] b, int off, int len) method:

public void write(byte[] b, int off, int len)

Parameters

• b -- The specified buffer

• off -- Offset to start in the data

• len -- The length of the bytes to write

Return Value

This method doesn't return any value.

Exception

• NA

Example

The following example shows the usage of java.io.ByteArrayOutputStream.write(byte[] b, int off, int len) method.

package com.tutorialspoint;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class ByteArrayOutputStreamDemo {
   public static void main(String[] args) throws IOException {
      
      byte[] bs = {65, 66, 67, 68, 69};
      ByteArrayOutputStream baos = null;
      
      try{

         // create new ByteArrayOutputStream
         baos = new ByteArrayOutputStream();
      
         // write byte array to the output stream
         baos.write(bs, 3, 2);
         
         // read all the bytes in the output stream
         for (byte b: baos.toByteArray())
         {
            System.out.println(b);
         }
      }catch(Exception e){

         // if I/O error occurs
         e.printStackTrace();
      }finally{
         if(baos!=null)
            baos.close();
      }   
   }
}

Let us compile and run the above program, this will produce the following result:

68
69