Migration to JDK 11 has error occure “java.lang.NoClassDefFoundError: javax/activation/DataSource” (tomcat 9.0.12) [duplicate]
This question already has an answer here: What is the replacement for javax.activation package in java 9? 3 answers Replacements for deprecated JPMS modules with Java EE APIs 7 answers I'm migrating java project use JDK8 to use JDK 11 then has error occurred relate of javax activation. Following migration guide from Oracle, I see java.activation that module was removed from JDK 11. After that, I give a suggest to added third parties **activation-1.0.2.jar* but still, an error has occurred? Please give a suggestion about problem ? and could you tell me about experience of Migration source code