Defining a Remote Interface 

Use

Writes the remote interface that defines the method signatures of the remote object. You then implement those methods signatures as described in Implementing the Remote Interface.

Procedure

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       1.      Extend a remote interface. You usually extend the java.rmi.Remote interface directly. See the requirements for defining a remote interface in Characteristics of a Remote Object.

       2.      Specify the methods signatures that the remote object will have. You are not obliged to declare java.rmi.RemoteException in the throw clauses of the methods; you can declare exceptions that are specific to your application.

Example

The account interface is a remote interface that defines three methods. It extends java.rmi.Remote directly. The draw method declares an OverdrawException in its throw clause, which is an application-specific exception.

public interface Account extends java.rmi.Remote {     // Define method signatures     public void deposit(int amount);     public void draw (int amount) throws OverdrawException;     public int getBalance() throws java.rmi.RemoteException; }

The definition of the OverdrawException class is as follows:

package exapmles.rmi_p4;   public class OverdrawException extends Exception {     public OverdrawException(int overdraw) {     super("Overdraw:" + overdraw);   } }