Jar File Does Not Run After IntelliJ Upgrade

Question

Expected

Jar file builds and runs with the following configuration described in the section Generate Deployable JAR — Step 3 of 4 in this Medium post and outlined below.

1. Packaging the application in a JAR File: Project Structure > Project Settings > Artifacts > + > Jar > From modules with dependencies…

   • Module: projectModuleName_main
   • MainClass:YourMainClassWithMainMethod
   • Manifest: src/main/manifestName
   • Output directory: projectName/out/artifacts/jarName_jar

2. Build and run JAR

   • Build > Build Artifacts… > Action > Build
   • Run Jar: Run > Edit Configurations: + and select JAR Application (Before launch: + > Build Artifacts > artifactName)

Observed

Jar file does not run after upgrading my version of IntelliJ.

Error

Error: Unable to initialize main class Initialization

Caused by: java.lang.NoClassDefFoundError: kotlin/TypeCastException

IntelliJ version

IntelliJ IDEA 2018.3.3 (Community Edition)

Build #IC-183.5153.38, built on January 9, 2019

JRE: 1.8.0_152-release-1343-b26 x86_64

JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o

Mac OS X 10.11.6

Answer 1

Deleting the existing Jar file and going through the steps outlined above Packaging the application in a JAR File and Build and run JAR resolved the issue. The new Jar is now running as expected.