Access restriction: The type BASE64Encoder is not accessible due to restriction

Problem

Downloaded a Java sample from Alexa API on Amazon service, imports it into Eclipse, but unable to compile and hits following “Access restriction” errors :

Access restriction: The type BASE64Encoder is not accessible due to restriction 
on required library 
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/classes.jar

P.S Using JDK 1.6 and Eclipse IDE 4.2

import sun.misc.BASE64Encoder; // Access restriction error 
 
   //...
   result = new BASE64Encoder().encode(rawHmac);

Solution

Using sun.* package should be avoided, read this statement.

If you insist want to use sun.misc.BASE64Encoder, in Eclipse, right click on the project, properties -> Java compiler –> Errors/Warnings –> Deprecated and restricted API –> Forbidden reference (access rules), change the default “Error” to “Warning“. Now, your code should be able to compile, but with some warning messages.

eclipse-access-rules-error

The above solution is not recommended, you should replace sun.misc.BASE64Encoder with other BASE64 class like Apache common codec.

import org.apache.commons.codec.binary.Base64;
 
    //...	
    result = new Base64().encodeToString(rawHmac);

References

  1. Alexa Web Information Service
  2. Apache common codec
  3. Why Developers Should Not Write Programs That Call ‘sun’ Packages
Tags :

About the Author

mkyong
Founder of Mkyong.com and HostingCompass.com, love Java and open source stuff. Follow him on Twitter, or befriend him on Facebook or Google Plus. If you like my tutorials, consider make a donation to these charities.

Comments

  • http://www.base64encoder.net/ Brandon

    Thanks for the tip. Who would have thought it was as easy as changing from “Error” to “Warning”. Are there any warning during runtime or only during compilation?

  • http://www.reklama.lapy.pl/tanio-wizytowki-lubin-legnica-polkowice/ pracownia reklamy

    What’s up, all the time i used to check webpage posts here early in the daylight, as i like to gain knowledge of more and more.

  • http://technorati.com/people/RemonaFlan/ 365bet ton

    It’s actually very complex in this active life to listen news on TV, so I simply use the web for that reason, and obtain the latest information.

  • http://www.l5.com.pl/ dolnoslaska agencja reklamowa

    Hello, I enjoy reading all of your post. I like to write a little comment to support
    you.

  • http://mudassirshahzad.com Mudassir Shahzad

    You are the man! BASE64Encoder is a great tool :)
    Thanks for sharing

  • Frisian

    Base64 encoding and decoding is part of the JDK since Java 6: http://docs.oracle.com/javase/6/docs/api/javax/xml/bind/DatatypeConverter.html
    No need to use the sun classes anymore.

    • http://mudassirshahzad.com Mudassir Shahzad

      Frisian, The only problem that I have with java jdk’s base64 encoding api is that it is licensed.