kotlin fun main(args:array)在命令行中不起作用

Question

// 1. doesn't work.
fun main(vararg args: String){
    println("this is a test.")
}

// 2. doesn't work
fun main(args: Array<String>){
    println("this is a test.")
}

// 3. this works. but where can I get the command line parameters?
fun main(){
    println("this is a test.")
}

λ java -jar test-1.0-SNAPSHOT.jar
Exception in thread "main" java.lang.NoClassDefFoundError: kotlin/jvm/internal/Intrinsics
        at com.yxy.ProgramFileKt.main(ProgramFile.kt)
Caused by: java.lang.ClassNotFoundException: kotlin.jvm.internal.Intrinsics
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 1 more

Answer 1

根据异常判断，您的jar不包含Kotlin stdlib。您需要稍微修改您的构建。

向您的Gradle构建中添加类似的内容应该可以解决这个问题：

dependencies {
  compile "org.jetbrains.kotlin:kotlin-stdlib:1.2.0"
}

附注。这个错误很常见，与main函数关系不大。尝试搜索错误消息。