Confusion converting InputStream to ByteArray

[Lineman]

Hi,

I am a little bit confused with the conversion of InputStream to ByteArray.

Can you guys please help me out with this confusion with some example?

Thanks in advance.

Regards,
Lineman

[Manthan]

Hey Sorry to say but I have a question for you.

Why do you want to 'convert' an ObjectInputStream into a ByteArray ?

[Sid-O]

Object to byte array.

First create a ByteArrayOutputStream and wrap it in an ObjectOutputStream now pass to a constructor. Here you can write your object to a ObjectOutputStream & close it. Now you can get the byte array from the ByteArrayOutputStream.

I hope this helps you.

[Grundy]

Convert InputStream to ByteArray

To convert the InputStream into a ByteArray first we read a file from the system by using FileInputStream. Since class InputStream is super class of the FileInputStream so we can store file into InputStream to take the file as input stream. To convert the input stream into string we use toString() method and then we use the method getBytes() to convert the string into byte array. Finally we display the string as output.

import java.io.*;
public class InputstramToByteArray
{
public static void main(String args[])throws IOException
  {
  InputStream itStrm=new FileInputStream(
 "InputstramToByteArray.java" );
  String str=itStrm.toString();
  byte[] b3=str.getBytes();
  for(int i=0;i<b3.length;i++)
  System.out.print(b3[i]+"\t");
  }
}

output

C:\Grundy\io>javac InputstramToByteArray.java

C:\Grundy\io>java InputstramToByteArray
106 97 118 97 46 105 111 46 70 105
108 101 73 110 112 117 116 83 116 114
101 97 109 64 51 101 50 53 97 53