BE THE CODER > Articles > Java > Basics > How to convert InputStream to Byte Array

The following example shows reading the content from an InputStream as Byte Array.

File Name :	com/bethecoder/articles/basics/ins2bytea/InputStream2ByteArrayTest.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.articles.basics.ins2bytea;



import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import java.util.Arrays;



public class InputStream2ByteArrayTest {



  /**

   * @param args

   */

  public static void main(String[] args) {



    InputStream ins = InputStream2ByteArrayTest.class

        .getClassLoader().getResourceAsStream("ABC.txt");

    

    byte [] streamAsBytes = stream2Bytes(ins);

    

    System.out.println(Arrays.toString(streamAsBytes));

    System.out.println(new String(streamAsBytes));

  }



  public static byte[] stream2Bytes(InputStream ins) {



    byte [] availableBytes = new byte [0];

    

      try {

          byte [] buffer = new byte[4096];

          ByteArrayOutputStream outs = new ByteArrayOutputStream();

          

          int read = 0;

          while ((read = ins.read(buffer)) != -1 ) {

            outs.write(buffer, 0, read);

          }

          

          ins.close();

          outs.close();

          availableBytes = outs.toByteArray();

          

      } catch (Exception e) { 

        e.printStackTrace();

      }

      

      return availableBytes;

  }

}