NoClassDefFoundError使用Scala类从Java

我没有 Scala的经验,所以这个问题可能是基本的.根据本教程中的“Person”示例,我正在使用 Java内的Scala类： http://www.codecommit.com/blog/java/interop-between-java-and-scala

我创建两个源文件,一个Scala和一个Java,如下所示.

Person.scala：

class Person {
  def getName() = "Daniel Spiewak"
}

Test.java：

public class Test {
  public static void main(String[] args) {
    Person p = new Person();
    p.getName();
  }
}

我可以编译(有一个我不明白的警告),但是当我尝试运行程序时,我得到一个ClassNotFoundException.

$scalac Person.scala
$javac Test.java
./Person.class: warning: Cannot find annotation method 'bytes()' in type 'ScalaSignature': class file for scala.reflect.ScalaSignature not found
1 warning
$java Test
Exception in thread "main" java.lang.NoClassDefFoundError: scala/ScalaObject
        at java.lang.classLoader.defineClass1(Native Method)
        at java.lang.classLoader.defineClass(ClassLoader.java:787)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.urlclassloader.defineClass(urlclassloader.java:447)
        at java.net.urlclassloader.access$100(urlclassloader.java:71)
        at java.net.urlclassloader$1.run(urlclassloader.java:361)
        at java.net.urlclassloader$1.run(urlclassloader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.urlclassloader.findClass(urlclassloader.java:354)
        at java.lang.classLoader.loadClass(ClassLoader.java:423)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.classLoader.loadClass(ClassLoader.java:356)
        at Test.main(Test.java:3)
Caused by: java.lang.classNotFoundException: scala.ScalaObject
        at java.net.urlclassloader$1.run(urlclassloader.java:366)
        at java.net.urlclassloader$1.run(urlclassloader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.urlclassloader.findClass(urlclassloader.java:354)
        at java.lang.classLoader.loadClass(ClassLoader.java:423)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.classLoader.loadClass(ClassLoader.java:356)
        ... 13 more

任何想法我在做错什么？

java -cp .:scala-library.jar Test