我在運行Server類(使用java服務器命令)時遇到異常,如下所示(我已經使用start rmiregistry命令啟動了rmiregistry).可能是什么問題呢？

C:\Users\william\Desktop\HelloWorld\Server>java Server

java.rmi.ServerException: RemoteException occurred in server thread; nested exce

ption is:

java.rmi.UnmarshalException: error unmarshalling arguments; nested excep

tion is:

java.lang.ClassNotFoundException: Hello

at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:419

)

at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:267)

at sun.rmi.transport.Transport$1.run(Transport.java:177)

at sun.rmi.transport.Transport$1.run(Transport.java:174)

at java.security.AccessController.doPrivileged(Native Method)

at sun.rmi.transport.Transport.serviceCall(Transport.java:173)

at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:5

53)

at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTranspor

t.java:808)

at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport

.java:667)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.

java:1110)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor

.java:603)

at java.lang.Thread.run(Thread.java:722)

at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow

n Source)

at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)

at sun.rmi.server.UnicastRef.invoke(Unknown Source)

at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)

at Server.main(Server.java:61)

Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested ex

ception is:

java.lang.ClassNotFoundException: Hello

at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)

at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:409

)

at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:267)

at sun.rmi.transport.Transport$1.run(Transport.java:177)

at sun.rmi.transport.Transport$1.run(Transport.java:174)

at java.security.AccessController.doPrivileged(Native Method)

at sun.rmi.transport.Transport.serviceCall(Transport.java:173)

at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:5

53)

at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTranspor

t.java:808)

at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport

.java:667)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.

java:1110)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor

.java:603)

at java.lang.Thread.run(Thread.java:722)

Caused by: java.lang.ClassNotFoundException: Hello

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 java.lang.ClassLoader.loadClass(ClassLoader.java:356)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Class.java:264)

at sun.rmi.server.LoaderHandler.loadProxyInterfaces(LoaderHandler.java:7

30)

at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:674)

at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:611)

at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:6

46)

at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:311

)

at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStrea

m.java:257)

at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1549)

at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1511)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1

750)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)

... 13 more

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