That’s part of the syntax of the new lambda expressions, to be introduced in Java 8. There are a couple of online tutorials to get the hang of it, here’s a link to one. Basically, the -> separates the parameters (left-side) from the implementation (right side). The general syntax for using lambda expressions is (Parameters) … Read more
You have 2 options here: extract the dependency into the artifact jar so that the app is the single executable jar with all the dependencies link the dependent jars via the Manifest.MF and copy them near the application main jar I’ve prepared a sample project that demonstrates both approaches: HelloWithDependencies.zip. The artifacts are produced into … Read more
You are already giving an explanation of your issue: I have not modified any VM options. Since JavaFX 11 is not part of the JDK anymore, you have to use the JavaFX SDK (as you are doing) from here, or alternatively use Maven/Gradle to retrieve the JavaFX modules from Maven Central. Then you need to … Read more
Press Ctrl+Shift+A to find actions, and input “reload”, you will find the “Reload All Maven Projects”. On a Mac, use ⌘+⇧+A instead.
I have fixed it in IDEA 12 by setting check box Enable annotation processing in: Settings -> Compiler -> Annotation Processors For IDEA 2016.2: Preferences… > Build, Execution, Deployment > Compiler > Annotation Processors After enabling, run Build -> Rebuild Project to have annotations recognized and eliminate errors. For IDEA 2019.2.1, depending on how the … Read more
Gradle cache is located at On Windows: %USERPROFILE%\.gradle\caches On Mac / UNIX: ~/.gradle/caches/ You can browse to these directory and manually delete it or run rm -r $HOME/.gradle/caches/ on UNIX system. Run this command will also force to download dependencies. UPDATE Clear the Android build cache of current project NOTE: Android Studio’s File > Invalidate … Read more
For copyright reasons the Servlet 5.0 API (implemented by Tomcat 10) and the Servlet 4.0 API (implemented by Tomcat 9) are incompatible: the API namespace changed from javax.* to jakarta.*. This can manifest in many ways: Software written for Servlet 4.0 does not compile against the API jars from Tomcat 10: cf. Servlet 5.0 JAR … Read more
First of all you should try File | Invalidate Caches and if it doesn’t help, delete IDEA system directory. Then re-import the Maven project and see if it helps. In some weird cases compiled classes may report wrong info and confuse IDEA. Verify that the classes from this jar report correct names using javap.
The error that you get occurs not on complilation, but when you try to run your application. It happens because Java was not able to find Table.class file inside db subdirectory of the project output directory (classpath). It can happen for multiple reasons: wrong main class selected in the run/debug configuration Table.java is excluded from … Read more
Java file is not analyzed since it’s located outside of the source root. You need to either relocate the file or reconfigure your content roots so that it resides under the folder configured as the Sources root. Sources root is marked in blue in the project view. Here is the example of the properly configured … Read more