NoClassDefFoundError: javax/activation/DataSource

Question

This is the code :

      Session session = Session.getDefaultInstance(props, null);
      Store store = session.getStore(\"imaps\");
      store.connect(\"im         


        

Answer 1

I solved a similar NoClassDefFoundError: javax/activation/DataSource problem in a mixed Java/Scala project by switching to Java 8 (it was Java9 by default).

Discussion: https://github.com/highsource/jsonix-schema-compiler/issues/81

Answer 2

I added activation.jar to buildpath and the problem is solved.

So i used 2 jars java-mail-ima.** .jar, activation.jar (for further referebces).

Answer 3

In case you use maven you can add manually

<dependency>
    <groupId>javax.activation</groupId>
    <artifactId>activation</artifactId>
    <version>1.1.1</version>
</dependency>