tornadofx
tornadofx copied to clipboard
edvin
Resource must not be null exceptions occurs when generated jar file is run.When I run the project , it totally fine.I use fxml for resources.
tornadofx.DefaultErrorHandler uncaughtException SEVERE: Uncaught error java.lang.IllegalStateException: component.javaClass.getResource(resource) must not be null
describe in more detail namely:
- a simple example where the error is reproduced;
- specify the project build system;
- project structure if it differs from the standard
java.lang.IllegalStateException: component.javaClass.getResource(resource) must not be null
at tornadofx.ResourceLookup.url(Component.kt:1304)
at tornadofx.FX$Companion$fxmlLocator$1.invoke(FX.kt:114)
at tornadofx.FX$Companion$fxmlLocator$1.invoke(FX.kt:88)
at tornadofx.UIComponent.loadFXML(Component.kt:1119)
at tornadofx.UIComponent$fxml$1.
I use gradle build system
`class AppLauncher {
companion object {
@JvmStatic
fun main(args : Array<String>) {
MyApp().main(arrayOf())
}
}
}`
I also use this app launcher class to launch the MyApp application.
The output is shown when I run the generated jar file.But the project perfectly worked.
`plugins { id 'application' id 'org.jetbrains.kotlin.jvm' version '1.3.72' id 'org.openjfx.javafxplugin' version '0.0.9' }
group 'org.example' version '1.0-SNAPSHOT'
repositories { mavenCentral() jcenter() }
javafx { version = "11.0.2" modules = ['javafx.controls', 'javafx.graphics'] }
jar {
manifest {
attributes('Main-Class': 'main.MyApp')
}
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib"
implementation 'no.tornado:tornadofx:1.7.20'
implementation "org.openjfx:javafx:11.0.2"
implementation "org.openjfx:javafx-base:11.0.2"
implementation "org.openjfx:javafx-controls:11.0.2"
implementation 'no.tornado:tornadofx-controlsfx:0.1'
implementation 'org.jetbrains.exposed:exposed-core:0.24.1'
implementation 'org.jetbrains.exposed:exposed-dao:0.24.1'
implementation 'org.jetbrains.exposed:exposed-jdbc:0.24.1'
implementation 'org.jetbrains.exposed:exposed-jodatime:0.24.1'
implementation 'mysql:mysql-connector-java:5.1.48'
implementation 'org.slf4j:slf4j-simple:1.7.21'
implementation 'org.apache.poi:poi:4.1.2'
}
compileKotlin { kotlinOptions.jvmTarget = "1.8" }
compileTestKotlin { kotlinOptions.jvmTarget = "1.8" }` This is my build.gradle file
In main view class , I access the fxml file like this.The fxml file is located under resources directory
`class MainView : View("MainView") {
override val root : BorderPane by fxml("/MainView.fxml")
}`
But jar file worked when I don't use fxml
class MainView : View("MainView") { override val root = borderpane { } }
MyApp().main(arrayOf())
incorrect launch https://edvin.gitbooks.io/tornadofx-guide/content/part1/3_Components.html
//
fun main(args: Array<String>) {
launch<MyApp>(args) // start app JavaFX (TornadoFX)
}
very similar to https://github.com/edvin/tornadofx/issues/1268
what version of TornadoFX and JavaFX do you have?
https://github.com/edvin/tornadofx/issues/1268#issuecomment-681109682
answer above, you need "TornadoFX 2.0-SNAPSHOT" https://github.com/edvin/tornadofx/issues/1268#issuecomment-681426394
I tried Snapshot version . I still get the same error when I run the generated jar file.
` class TestView : View("My View") {
override val root : Parent = FXMLLoader.load(javaClass.getResource("/TestView.fxml"))
}`
**When I load fxml using FXMLLOADER , I get new error :-) **
tornadofx.DefaultErrorHandler uncaughtException
SEVERE: Uncaught error
java.lang.NullPointerException: Location is required.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3230)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3194)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3163)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3136)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3113)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3106)
at main.TestView.
Finally I found a solution . May not be a good solution . But it works for me.
` class TestView : View("My View") {
private val url = File("src/main/resources/TestView.fxml").toURI().toURL()
override val root: Parent = FXMLLoader(url).also { loader -> loader.setController(this) }.load()
@FXML
lateinit var lbl_test : Label
init {
lbl_test.text = "This is testing string"
}
}`