scala - 将 Scala 应用程序作为 Java 应用程序运行

Question

我正在尝试运行以下火箭发射应用程序:

object HelloWorld {
    def main(args: Array[String]) {
        println("Hello World!")
    }
}

直接从 java 像这样:

java -cp scala-library.jar HelloWorld

(显然在与 Scala 合规之后)

但得到以下错误:

Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld
Caused by: java.lang.ClassNotFoundException: HelloWorld
        at java.net.URLClassLoader$1.run(Unknown Source)
(...)
Could not find the main class: HelloWorld.  Program will exit.

我是否监督过任何我需要做的琐碎事情才能使其发挥作用？

Answer 1

来自 Java documentation :

The default class path is the current directory. Setting the CLASSPATH variable or using the -classpath command-line option overrides that default, so if you want to include the current directory in the search path, you must include "." in the new settings.

添加 .: (或 .; 在 Windows 上)到类路径的开头应该可以工作。