Implementation of equals, hashCode, and

Question

I am writing an RMI application where the implementation of the remote interface cannot extend UnicastRemoteObject because it already extends another class. So, I need to explicitly export the server object using UnicastRemoteObject.exportObject(server, 0);� no problem.
Problem is I�ve read that in order to make the class behave as if it had extend UnicastRemoteObject, you must provide implementations for equals, hashCode, and toString. I�ve searched the world over for implementations of these methods equivalent to those found in UnicastRemoteObject� no luck so far.
Could you help me out?
I�ve found some code that I�ve listed below� Is it equivalent to the equals and hashCode method found in UnicastRemoteObject? What about toString()?
public class RemoteDataServer extends LocalDataServer implements RemoteInterface{
    private Remote serverStub;
    public RemoteDataServer() throws IOException {
        super();
        //export remote object
        serverStub = UnicastRemoteObject.exportObject(this);
    public boolean equals(Object obj) {
        return (obj == this || serverStub.equals(obj));
    public int hashCode() {
        return serverStub.hashCode();
//toString()???

Answer 1

Hi,
At book Effective Java by Joshua Bloch you can see some info
overriding these members.
See at http://java.sun.com/docs/books/effective/index.html
Here is the toString()spec method from Object :
Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.
The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
but toString from class String simply returns the string contents of
an object.
Hope this help