Gradle implementation vs compile in jar task - jar

Question

I can successfully use Gradle to compile a fat JAR, but having trouble running the JAR after recently switching from the "compile" dependency specification to the "implementation/api" specification. I have isolated that the problem occurs in only one of the two following cases. The application runs in either case inside IntelliJ.
first/problem:
dependencies {implementation 'no.tornado:tornadofx:1.7.18'}
second/works:
dependencies {compile'no.tornado:tornadofx:1.7.18'}
The JAR compiles in both cases. The problem appears when I attempt to start the first case JAR on the command line and it throws the following error.
C:\aaa_eric\code\testr\mic\build\libs>java -jar mic-1.0-snapshot.jar
Error: Could not find or load main class app.MyApp
Caused by: java.lang.NoClassDefFoundError: tornadofx/App
Here is the JAR task in build.gradle. Is it possible that the tornadofx dependency is available at compile time, but not at run time? Thanks for any help.
jar {
manifest {
attributes 'Main-Class': 'app.MyApp'
}
from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
}

Answer 1

Changing configurations.compile.collect to configurations.compileClasspath.collect fixed the problem for me.
I was having the same problem and stumbled across this in https://docs.gradle.org/current/javadoc/org/gradle/api/artifacts/ConfigurationContainer.html:
An example showing how to refer to a given configuration by name in
order to get hold of all dependencies (e.g. jars, but only)
apply plugin: 'java' //so that I can use 'implementation', 'compileClasspath' configuration
dependencies {
implementation 'org.slf4j:slf4j-api:1.7.26'
}
//copying all dependencies attached to 'compileClasspath' into a specific folder
task copyAllDependencies(type: Copy) {
//referring to the 'compileClasspath' configuration
from configurations.compileClasspath
into 'allLibs'
}
One thing to note is that configurations.compileClasspath.collect worked for me even when I was using the compile specification instead of implement.