運行的Scala程序作爲一個Java應用程序

Question

我試圖運行下面的火箭發射應用：

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

直接從Java這樣的：

java -cp scala-library.jar HelloWorld 

（使用Scala compliling後明顯）

但出現以下錯誤：

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. 

我是否監督了我需要做的任何微不足道的工作？

Answer 1

從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 .;）到類路徑應該工作的開始。

Answer 2

請嘗試：這裏

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