Compare the contents of two Streams to determine if they are equal or not. : InputStream « File « Java Tutorial

Java Tutorial
1. Language
2. Data Type
3. Operators
4. Statement Control
5. Class Definition
6. Development
7. Reflection
8. Regular Expressions
9. Collections
10. Thread
11. File
12. Generics
13. I18N
14. Swing
15. Swing Event
16. 2D Graphics
17. SWT
18. SWT 2D Graphics
19. Network
20. Database
21. Hibernate
22. JPA
23. JSP
24. JSTL
25. Servlet
26. Web Services SOA
27. EJB3
28. Spring
29. PDF
30. Email
31. J2ME
32. J2EE Application
33. XML
34. Design Pattern
35. Log
36. Security
37. Apache Common
38. Ant
39. JUnit
Java
Java Source Code / Java Documentation
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Tutorial » File » InputStream 
11. 7. 4. Compare the contents of two Streams to determine if they are equal or not.
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
/** * Origin of code: Apache Avalon (Excalibur)
 
 @author Peter Donald
 @author Jeff Turner
 @author Matthew Hawthorne
 @author Stephen Colebourne
 @author Gareth Davis
 @version CVS $Revision$ $Date$*/
public class Main {
  /**
   * Compare the contents of two Streams to determine if they are equal or not.
   
   * This method buffers the input internally using <code>BufferedInputStream</code> if they are
   * not already buffered.
   
   @param input1
   *            the first stream
   @param input2
   *            the second stream
   @return true if the content of the streams are equal or they both don't exist, false
   *         otherwise
   @throws NullPointerException
   *             if either input is null
   @throws IOException
   *             if an I/O error occurs
   */
  public static boolean contentEquals(InputStream input1, InputStream input2throws IOException
  {
    if (!(input1 instanceof BufferedInputStream))
    {
      input1 = new BufferedInputStream(input1);
    }
    if (!(input2 instanceof BufferedInputStream))
    {
      input2 = new BufferedInputStream(input2);
    }

    int ch = input1.read();
    while (-!= ch)
    {
      int ch2 = input2.read();
      if (ch != ch2)
      {
        return false;
      }
      ch = input1.read();
    }

    int ch2 = input2.read();
    return (ch2 == -1);
  }
}
11. 7. InputStream
11. 7. 1. Creating an input or output stream on a ByteBuffer
11. 7. 2. Creating a Manifest for a JAR File
11. 7. 3. Convert InputStream to String
11. 7. 4. Compare the contents of two Streams to determine if they are equal or not.
11. 7. 5. Compare two InputStream
11. 7. 6. Counts down from a specified value the number of bytes actually read from the wrapped InputStream.
11. 7. 7. EOLConvertingInputStream: InputStream which converts \r bytes not followed by \n and \n not preceded by \r to \r\n.
11. 7. 8. Minimal InputStream subclass to fetch bytes form a String
11. 7. 9. Read and return the entire contents of the supplied InputStream.
11. 7. 10. Read and return the entire contents of the supplied InputStream. This method always closes the stream when finished reading.
11. 7. 11. Reads at most certain bytes from input stream and returns them as a byte array.
11. 7. 12. Using a Reader and a Writer, returns a String from an InputStream
11. 7. 13. Write the entire contents of the supplied string to the given stream. This method always flushes and closes the stream when finished.
11. 7. 14. Resettable File InputStream
11. 7. 15. An InputStream class that terminates the stream when it encounters a particular byte sequence.
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.