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我创建了这个代码来通知我的程序的观察者。但是当我调用 notfyObservers() 方法时,它给了我错误。这是 Java RMI 程序。

IllegalArgumentException:Java 中的参数类型不匹配

notifyObserver() 方法:

@Override
public void notifyObservers(JPanel ob) throws RemoteException {
    Object[] arrLocal;

    synchronized (this) {
        if (!changed) {
            return;
        }
        arrLocal = listObs.toArray();
        clearChanged();
    }
    for (int i = arrLocal.length - 1; i >= 0; i--) {
        ((RemoteObserver) arrLocal[i]).modify(this, ob);
    }
}

称为..

questionController.notifyObservers(null);

我在 a 中调用此方法JPanel,而我的错误是当我通过 jpanel 时..

java.rmi.MarshalException: error marshalling arguments; nested exception is: 
java.io.NotSerializableException: javax.swing.GroupLayout

如果我通过null,我得到了。

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: argument type mismatch
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
    at sun.rmi.transport.Transport$1.run(Transport.java:159)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)

提前致谢!

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1 回答 1

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它接缝参数在方法JPanel中不能为空modify()

((RemoteObserver) arrLocal[i]).modify(this, ob)

UPD哇,您正试图通过 Web 服务发送JPanel一些非组件。Serializable也许你应该只发送一些参数。

于 2013-10-15T19:30:55.627 回答