The classes I have used so far in the codeblock all work. As soon as I try to use Label, even if I dont add it to the Scene I get the following errors. I use Intellij, I was thinking that the classes I use are already available in Intellij and Label is not one of the included, and that's why I get the error.
I have downloaded JavaFX 13 and the folder is on my desktop, in the Project settings - Libraries the path for JavaFX goes to Desktop/javafx-sdk-13.0.2/lib
Code
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.GridPane;
import javafx.scene.text.Text;
import javafx.stage.Stage;
public class CompoundInterest extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
// Group root = new Group();
GridPane pane = new GridPane();
pane.setAlignment(Pos.CENTER);
pane.setPadding(new Insets(5,5,5,5));
pane.setHgap(5.5);
pane.setVgap(5.5);
Label label = new Label();
Text text1 = new Text("Test");
pane.add(text1,1,1);
// pane.add(new Label("Username"), 0, 0);
Scene scene = new Scene(pane, 400, 400);
primaryStage.setResizable(false);
primaryStage.setTitle("Test");
primaryStage.setScene(scene);
primaryStage.show();
}
}
Error message:
Exception in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.lang.IllegalAccessError: superclass access check failed: class com.sun.javafx.scene.control.ControlHelper (in unnamed module @0x20a25f19) cannot access class com.sun.javafx.scene.layout.RegionHelper (in module javafx.graphics) because module javafx.graphics does not export com.sun.javafx.scene.layout to unnamed module @0x20a25f19
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:821)
at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:719)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:642)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:600)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at javafx.scene.control.Control.<clinit>(Control.java:86)
at assignment_2.exercise7.CompoundInterest.start(CompoundInterest.java:28)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
... 1 more
Exception running application assignment_2.exercise7.CompoundInterest
Process finished with exit code 1
In Intellij Run -> Edit configurations Set module path to "--module-path "pathToJavaFx\javafx-sdk-13.0.2\lib" --add-modules javafx.controls,javafx.fxml"
Is explained here https://openjfx.io/openjfx-docs/
As the Getting Started page explains, you have a choice in how to build your JavaFX projects.
JavaFX 13 builds on top of JDK 13 and is a standalone component. There are 2 different options for developing JavaFX applications:
Use the JavaFX SDK
Use a build system (eg maven/gradle) to download the required modules from Maven Central.
The other Answer seems to address the first. You may instead choose to make you project driven by a tool such as Maven .
While learning a bit about Maven may seem like an annoying diversion, I have found it to be worth the time and effort, saving time with configuration and building of my projects. And Maven-driven projects are portable between the major IDE s.
For instructions on using configuring your Maven POM file for OpenJFX work, see Run HelloWorld using Maven .
As shown on that documentation page, this XML element in your Maven POM will result in the necessary JavaFX classes, including Label
, being automatically downloaded for use within your app.
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>13</version>
</dependency>
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