How to compile Kotlin to include jar of Java with command line?

Question

I want to include jar of Java to Kotlin. I tried like below, but I had error.

javac -encoding utf-8 javasorce/test/JavaTestClass.java
jar cvf javasorce/test/JavaTestClass.jar javasorce/test/JavaTestClass.class

kotlinc kotlin/CallJavaTestClass.kt -cp javasorce/test/JavaTestClass.jar -include-runtime -d kotlin/CallJavaTestClass.jar

java -jar kotlin/CallJavaTestClass.jar

The error is:

Exception in thread "main" java.lang.NoClassDefFoundError: 
javasorce/test/JavaTestClass at CallJavaTestClassKt.main(CallJavaTestClass.kt:5)
        Caused by: java.lang.ClassNotFoundException: javasorce.test.JavaTestClass
                at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
                at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
                at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
                at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
                ... 1 more

I am using like below directories:

root
|-javasorce
| |-test
|   |-JavaTestClass.java
|-kotlin
  |-CallJavaTestClass.kt

Please tell me if there is solution.

hotkey · Accepted Answer · 2017-10-20T22:03:40.503

In addition to compiling the source code with the Java library on the classpath, you need to run the program with the same library on the classpath: if a class is there at compile time, you need it on the classpath at run time as well to be able to use it.

The correct way of running an application which has its classes scattered across several JARs is to pass those JARs as the classpath to java and to additionally specify the class that has the main function:

java CallJavaTestClassKt -cp kotlin/CallJavaTestClass.jar:javasorce/test/JavaTestClass.jar

^{The command above assumes that you placed the main function on top level of CallJavaTestClass.kt (in this case, the class name is formed by the file name with .kt replaced by Kt), and it has no package ... declaration. If you have a package, prepend it to the class name as com.example.FileNameKt. If you declare main in an object or a companion object, use the class name or the object name (without Kt) instead of CallJavaTestClassKt.}

See also: How to run Kotlin class from the command line?

Thanks to you, I solved! Your answer is very very easy to understand! Most of your answer was correct, but there is a one mistake. The correct way of running an application is not `java CallJavaTestClassKt -cp kotlin/CallJavaTestClass.jar:javasorce/test/JavaTestClass.jar` but `java -cp kotlin/CallJavaTestClass.jar:javasorce/test/JavaTestClass.jar CallJavaTestClassKt`. In your suggestion, `java` could not found CallJavaTestClassKt. — naokichi, Oct 21 '17 at 03:11

How to compile Kotlin to include jar of Java with command line?

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