Java/File Input Output/ByteArrayInputStream

ByteArrayInputStream Reset

   <source lang="java">
  

import java.io.ByteArrayInputStream; import java.io.IOException; class MainClass {

 public static void main(String args[]) throws IOException {
   String tmp = "abc";
   byte b[] = tmp.getBytes();
   ByteArrayInputStream in = new ByteArrayInputStream(b);
   for (int i = 0; i < 2; i++) {
     int c;
     while ((c = in.read()) != -1) {
       if (i == 0) {
         System.out.print((char) c);
       } else {
         System.out.print(Character.toUpperCase((char) c));
       }
     }
     System.out.println();
     in.reset();
   }
 }

}

 </source>
   
  
 
  

Byte Array IO

   <source lang="java">
  

import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; public class ByteArrayIOApp {

 public static void main(String args[]) throws IOException {
   ByteArrayOutputStream outStream = new ByteArrayOutputStream();
   String s = "This is a test.";
   for (int i = 0; i < s.length(); ++i)
     outStream.write(s.charAt(i));
   System.out.println("outstream: " + outStream);
   System.out.println("size: " + outStream.size());
   ByteArrayInputStream inStream;
   inStream = new ByteArrayInputStream(outStream.toByteArray());
   int inBytes = inStream.available();
   System.out.println("inStream has " + inBytes + " available bytes");
   byte inBuf[] = new byte[inBytes];
   int bytesRead = inStream.read(inBuf, 0, inBytes);
   System.out.println(bytesRead + " bytes were read");
   System.out.println("They are: " + new String(inBuf));
 }

}

 </source>
   
  
 
  

Convert string into InputStream using ByteArrayInputStream class.

   <source lang="java">
 

import java.io.ByteArrayInputStream; import java.io.InputStream; public class Main {

 public static void main(String[] args)throws Exception {
   String text = "Converting String to InputStream Example";
   InputStream is = new ByteArrayInputStream(text.getBytes("UTF-8"));
 }

}

 </source>
   
  
 
  

Demonstrate ByteArrayInputStream

   <source lang="java">
  

import java.io.ByteArrayInputStream; import java.io.IOException; class ByteArrayInputStreamDemo {

 public static void main(String args[]) throws IOException {
   String tmp = "abcdefghijklmnopqrstuvwxyz";
   byte b[] = tmp.getBytes();
   ByteArrayInputStream input1 = new ByteArrayInputStream(b);
   ByteArrayInputStream input2 = new ByteArrayInputStream(b, 0, 3);
 }

}

 </source>
   
  
 
  

Read ByteArrayInputStream to String

   <source lang="java">

import java.io.ByteArrayInputStream; /*

* The contents of this file are subject to the terms 
* of the Common Development and Distribution License 
* (the "License").  You may not use this file except 
* in compliance with the License.
* 
* You can obtain a copy of the license at 
* glassfish/bootstrap/legal/CDDLv1.0.txt or 
* https://glassfish.dev.java.net/public/CDDLv1.0.html. 
* See the License for the specific language governing 
* permissions and limitations under the License.
* 
* When distributing Covered Code, include this CDDL 
* HEADER in each file and include the License file at 
* glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable, 
* add the following below this CDDL HEADER, with the 
* fields enclosed by brackets "[]" replaced with your 
* own identifying information: Portions Copyright [yyyy] 
* [name of copyright owner]
*/

/*

* @(#)ASCIIUtility.java  1.10 05/08/29
*
* Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
*/

public class Utils {

 public static String toString(ByteArrayInputStream is) {
   int size = is.available();
   char[] theChars = new char[size];
   byte[] bytes    = new byte[size];
   is.read(bytes, 0, size);
   for (int i = 0; i < size;)
       theChars[i] = (char)(bytes[i++]&0xff);
   
   return new String(theChars);
     }

}

 </source>