how do I solve this error Exception in thread "main" java.lang.NoClassDefFoundError: javax/crypto/SecretKey

Question

How do I solve this error Exception in thread "main" java.lang.NoClassDefFoundError: javax/crypto/SecretKey

import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlForm;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.html.HtmlSubmitInput;
import com.gargoylesoftware.htmlunit.html.HtmlTextInput;
import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.Page;
import com.gargoylesoftware.htmlunit.RefreshHandler;
import java.io.IOException;
import java.net.URL;

public class veriçekmek {

    public static void main(String[] args) throws Exception {

        WebClient web=new WebClient();
        HtmlPage sayfa=web.getPage("http://www.idefix.com");

When I run this program I get an error like this

 Exception in thread "main" java.lang.NoClassDefFoundError: javax/crypto/SecretKey

Possible duplicate of [Why am I getting package javax.crypto does not exist](http://stackoverflow.com/questions/14935447/why-am-i-getting-package-javax-crypto-does-not-exist) — ozOli, Feb 16 '17 at 13:09

score 0 · Accepted Answer · answered Feb 16 '17 at 13:05

0

javax.crypto package is included in jce.jar, which can be found under the "lib" folder of your JRE. Add it to your classpath, and you should be fine.

For more information about classpath, see: http://docs.oracle.com/javase/7/docs/technotes/tools/windows/classpath.html

answered Feb 16 '17 at 13:05

Yoav Gur

1,366
9
15

How do you run your program? From command line? From eclipse? Another way? – Yoav Gur Feb 16 '17 at 13:55
Try: right click on the project -> Properties -> Java Build Path -> Libraries -> Add External Jars... – Yoav Gur Feb 16 '17 at 14:16
ı solved this problem.I setup jdk again and It works. :) thank you so much – Mustafa Savran Feb 16 '17 at 14:50

score 0 · Answer 2 · answered Sep 16 '21 at 14:31

0

I solved this by installing a new reference jdk from https://jdk.java.net.

For whatever reason, these builds include the crypto jars that were missing from the oracle builds.

answered Sep 16 '21 at 14:31

Adrian C

71
3

how do I solve this error Exception in thread "main" java.lang.NoClassDefFoundError: javax/crypto/SecretKey

2 Answers2