Can you build web applications with Kotlin?Īlthough Kotlin is well-known among developers as a language for building Android apps and backends, it's also great for building web apps. Kotlin runs on the JVM and is fully interoperable with existing Java code, which means you can use it both in new and existing projects. Vaadin supports the Kotlin programming language through the Karibu-DSL library, which contains various extensions to use Vaadin and Kotlin together.ĭespite its simplicity, Kotlin is a fully type-safe language and helps you avoid many common programming errors in Java, such as null-pointer exceptions. Its concise and expressive syntax feels liberating compared to the verbosity of Java. Therefore your class name is the one you chose: // file App.Kotlin is a programming language that has gained much popularity over the last few years. You can change the name of this class within the file by adding this file-targeted annotation: can also put your main() into a class with a companion object and make it static using the JvmStatic annotation. This name is derived from your filename with Kt appended. Then you can execute the program by running the com.my.stuff.AppKt class. To run a Kotlin class you are actually running a special class that is created at the file level that hold your main() and other functions that are top-level (outside of a class or interface). Which made me think that maybe I needed to add the class file to my declared classpath so: C:\Users\User\Desktop>java -cp kotlin-runtime.jar' _DefaultPackage.class _DefaultPackage So I tried the following: C:\Users\User\Desktop>java -cp kotlin-runtime.jar _DefaultPackageĮrror: Could not find or load main class _DefaultPackage This led me to believe that the Kotlin runtime was simply missing, given that output.
When I try to run it like I would a normal java class I get the following: C:\Users\User\Desktop>java _DefaultPackageĮxception in thread "main" : jet/runtime/IntrinsicsĬaused by: : Īt $1.run(URLClassLoader.java:366)Īt $1.run(URLClassLoader.java:355)Īt (Native Method)Īt (URLClassLoader.java:354)Īt (ClassLoader.java:423)Īt $AppClassLoader.loadClass(Launcher.java:308)Īt (ClassLoader.java:356) Here is my situation: I can't run a compiled Kotlin class. I understand this question has been asked before, but none of the information there has helped me.
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