我不知道为什么会出现运行时错误，我用谷歌搜索了这个问题，它说在编译时可用的类在运行时不再可用。
这是代码：
package examples.RMIShape;
import java.rmi.*;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
//import java.rmi.server.UnicastRemoteObject;
public class ShapeListServer {
public static void main(String args[]){
// System.setSecurityManager(new RMISecurityManager());
System.out.println("Main OK");
try{
ShapeList aShapelist = new ShapeListServant();
System.out.println("After create");
String registryURL = "rmi://localhost:" + "/ShapeList";
startRegistry();
Naming.rebind(registryURL, aShapelist);
System.out.println("ShapeList server ready");
}catch(Exception e) {
System.out.println("ShapeList server main " + e.getMessage());
}
}
// This method starts a RMI registry on the local host, if it
// does not already exists at the specified port number.
private static void startRegistry()throws RemoteException{
Registry registry;
try {
registry = LocateRegistry.getRegistry();
registry.list( ); // This call will throw an exception
// if the registry does not already exist
}
catch (RemoteException e) {
// No valid registry at that port.
System.out.println ("RMI registry cannot be located at port " + Registry.REGISTRY_PORT );
registry = LocateRegistry.createRegistry(Registry.REGISTRY_PORT);
System.out.println("RMI registry created at port " + Registry.REGISTRY_PORT);
}
} // end startRegistry
}