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When I compile a class using javax.crypto.Mac I get this error message?

package javax.crypto does not exist

I can fix it by including jre/lib/jce.jar in my compile classpath.

Why is jce.jar not on the default jdk classpath? jre/lib/rt.jar is on the classpath, and includes other javax packages, but jce seems special?

BuZZ-dEE
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Mike Hogan
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  • Just to mention, `jre/lib` path should be in your path anyways. If that was not included then you have not setup java properly on your machine. – mtk Feb 18 '13 at 11:54
  • I used the oracle installer. My version information is java version "1.7.0_10" Java(TM) SE Runtime Environment (build 1.7.0_10-b18) Java HotSpot(TM) 64-Bit Server VM (build 23.6-b04, mixed mode) – Mike Hogan Feb 18 '13 at 12:03
  • my colleague has exactly the same problem with openjdk on ubuntu. – Mike Hogan Feb 18 '13 at 12:08
  • Your title doesn't agree with your question. – user207421 Feb 18 '13 at 12:27
  • My apologies. I was compiling with an inherited Ant file, and I did not notice that that the javac task had this specified: bootclasspath="${java.home}/lib/rt.jar". I will answer the question (as a mistake :) ) – Mike Hogan Feb 18 '13 at 12:37

3 Answers3

23

OK, this was a mistake on my part. The Ant file I was using to compile the code had this attribute on the javac task:

bootclasspath="${java.home}/lib/rt.jar"

Doh. You can add the JCE jar like this:

bootclasspath="${java.home}/lib/rt.jar:${java.home}/lib/jce.jar"
sourcenouveau
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Mike Hogan
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9

Beware! This class is only included in the jdk from oracle. That means your program won;t be portable among different jdk (eg openjdk) It is preferable to use this lib externally, it can be downloaded from here

user405837
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0

It worked for me, I downloaded the zip and paste these 3 files into C:\Program Files\Java\jdk1.7.0_11\jre\lib\ext as explained in jce-1_2_2/jce1.2.2/INSTALL.html in the zip file.

  • jce1_2_2.jar
  • US_export_policy.jar
  • local_policy.jar
Paul Roub
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Fabio Giaquinta
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