运行的Scala程序作为一个Java应用程序

Question

我试图运行下面的火箭发射应用：

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

直接从Java这样的：

java -cp scala-library.jar HelloWorld 

（使用Scala compliling后明显）

但出现以下错误：

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. 

我是否监督了我需要做的任何微不足道的工作？

Answer 1

从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Windows .;）到类路径应该工作的开始。

Answer 2

请尝试：这里

java -cp %SCALA_HOME%\lib\scala-library.jar;. HelloWorld