确保kotlin方法是静态的，顶级的或注释的@JvmStatic

如何将main声明为static，以便该方法按照以下方式运行（交互式）：

 thufir@dur:~/kotlin$ thufir@dur:~/kotlin$ kotlinc Welcome to Kotlin version 1.1.51 (JRE 9.0.0.15+181) Type :help for help, :quit for quit >>> >>> println("hello world"); WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.intellij.util.text.StringFactory to constructor java.lang.String(char[],boolean) WARNING: Please consider reporting this to the maintainers of com.intellij.util.text.StringFactory WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release hello world >>> >>> :quit thufir@dur:~/kotlin$ 

编译：

 thufir@dur:~/kotlin$ thufir@dur:~/kotlin$ kotlinc Hello.kt WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.intellij.util.text.StringFactory to constructor java.lang.String(char[],boolean) WARNING: Please consider reporting this to the maintainers of com.intellij.util.text.StringFactory WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release thufir@dur:~/kotlin$ thufir@dur:~/kotlin$ kotlin HelloKt error: could not find or load main class HelloKt thufir@dur:~/kotlin$ thufir@dur:~/kotlin$ kotlin Hello error: 'main' method of class Hello is not static. Please ensure that 'main' is either a top level Kotlin function, a member function annotated with @JvmStatic, or a static Java method thufir@dur:~/kotlin$ thufir@dur:~/kotlin$ cat Hello.kt class Hello { public fun main(args: Array) { println("Hello, world!" + args[0]) } } thufir@dur:~/kotlin$ 

也可以看看：

https://kotlinlang.org/docs/tutorials/command-line.html

Answer 1

在教程中，该方法是在顶层声明的，而不是在class Hello 。 或者，你可以写

 import kotlin.jvm.JvmStatic object Hello { @JvmStatic public fun main(args: Array) { println("Hello, world!" + args[0]) } }