Compling problem

[javarishi]

Hei Buddy, This Code You Need To Put Inside The Class.

If you are a buiginner in java i suggest for Cathey Sierra HeadFirst java Book. Please Go Through It First.

[sanjeevtarar]

Quote:

Originally Posted by denisdoherty

When i put public void ReturnAverage (String Average) throws RemoteException
{
}

You need to put this code in implementing class dear.

If still you have doubt ..please post your interface and class code.


sanjeev

[javarishi]

Hei denisdoherty,
Are You Done With The Problem? Any Help Required ?

[denisdoherty]

I still cannot get the { error part. Do u want me to post the code inside the interface and the code in the class?

[javarishi]

Yaah you paste it here.

[denisdoherty]

The code that i have in the interface is.

The first error that I am getting is highlighted in bold.

The error hear is Interface methods cannot have body.

Code:

import java.rmi.Remote;
import java.rmi.RemoteException;

interface Interface extends Remote{

    //Returns the Sum of the Number
    public void ReturnSum (String Sum) throws RemoteException
    {
    }
    //Returns the Product of the Number    
    public void ReturnProduct (String Product) throws RemoteException
    {
    }
    //Returns the Average of the Number    
    public void ReturnAverage (String Average) throws RemoteException
    {
    }
}//end Interface

And the code that i have in the class is.

The error that i am getting within this class is highlighted in bold.

This error is Helper is not abstract and does not override abstract method ReturnAverage(java.lang.String) in Interface

Code:

import java.net.*;
import java.io.*;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.rmi.registry.LocateRegistry;
import java.rmi.RMISecurityManager;

public class Helper implements  Interface {

   private final int SIZE =10;
   private ASumList sumList[];
   private int serverPort;
   private int numNumber;
   private InetAddress serverHost;
   private StreamSocket mySocket;
  // private InetAddress serverHost;
   
   public Helper(){
       super();
       
       sumList = new ASumList [SIZE];
       numNumber = 0;
    }

    Helper(String hostName,String portNum) throws SocketException,
                     UnknownHostException, IOException {                              
       this.serverHost = InetAddress.getByName(hostName);
       this.serverPort = Integer.parseInt(portNum);
       //Instantiates a stream-mode socket and wait for a connection.
       this.mySocket = new StreamSocket(this.serverHost, this.serverPort); 
       System.out.println("Connection request made");
      
   } // end constructor
   
       
   public String getnumber( String message) throws SocketException, IOException{     
      String number = "", nextnumber="";;    
      mySocket.sendMessage( message);
      
       // now receive the names
      nextnumber = mySocket.receiveMessage();
      while (!nextnumber.equals("")) {
          number += nextnumber+" ";      
          nextnumber = mySocket.receiveMessage();
        }
      return number;
   } // end getnumber
    

   public synchronized int ReturnSum (){
       String list ="";
       for (int i = 0; i < numNumber; i++)
            list = list+ sumList[i].getSum();
            list.trim();
            return numNumber;
    }
    public synchronized int Returnproduct(){
        String list ="";
        for (int i =0;i<numNumber; i++)
            list = list+sumList[i].getSum();
             list.trim();
            return numNumber;
        }
    
    public synchronized int ReturnAverage(){
        String list ="";
        for (int i = 0; i<numNumber; i++)
            list = list+sumList[i].getSum();
            list.trim();
            return numNumber;
        }
        public void done( ) throws SocketException, IOException{
      mySocket.close( );
   } // end done 
} //end class

Would be greatful if anyone can help.

Thanks

[javarishi]

I have made the necessary changes. Try To Compile It.

Interface
----------

import java.rmi.Remote;
import java.rmi.RemoteException;

interface Interface extends Remote{

//Returns the Sum of the Number
public void ReturnSum (String Sum) throws RemoteException;

//Returns the Product of the Number
public void ReturnProduct (String Product) throws RemoteException;

//Returns the Average of the Number
public void ReturnAverage (String Average) throws RemoteException;
}//end Interface


Class
--------

import java.net.*;
import java.io.*;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.rmi.registry.LocateRegistry;
import java.rmi.RMISecurityManager;

public class Helper implements Interface {

private final int SIZE =10;
private ASumList sumList[];
private int serverPort;
private int numNumber;
private InetAddress serverHost;
private StreamSocket mySocket;
// private InetAddress serverHost;

public Helper(){
super();

sumList = new ASumList [SIZE];
numNumber = 0;
}

Helper(String hostName,String portNum) throws SocketException,
UnknownHostException, IOException {
this.serverHost = InetAddress.getByName(hostName);
this.serverPort = Integer.parseInt(portNum);
//Instantiates a stream-mode socket and wait for a connection.
this.mySocket = new StreamSocket(this.serverHost, this.serverPort);
System.out.println("Connection request made");

} // end constructor


public String getnumber( String message) throws SocketException, IOException{
String number = "", nextnumber="";;
mySocket.sendMessage( message);

// now receive the names
nextnumber = mySocket.receiveMessage();
while (!nextnumber.equals("")) {
number += nextnumber+" ";
nextnumber = mySocket.receiveMessage();
}
return number;
} // end getnumber


public synchronized int ReturnSum (){
String list ="";
for (int i = 0; i < numNumber; i++)
list = list+ sumList[i].getSum();
list.trim();
return numNumber;
}
public synchronized int Returnproduct(){
String list ="";
for (int i =0;i<numNumber; i++)
list = list+sumList[i].getSum();
list.trim();
return numNumber;
}

public synchronized int ReturnAverage(){
String list ="";
for (int i = 0; i<numNumber; i++)
list = list+sumList[i].getSum();
list.trim();
return numNumber;
}
public void done( ) throws SocketException, IOException{
mySocket.close( );
} // end done

//Returns the Sum of the Number
public void ReturnSum (String Sum) throws RemoteException
{
}
//Returns the Product of the Number
public void ReturnProduct (String Product) throws RemoteException
{
}
//Returns the Average of the Number
public void ReturnAverage (String Average) throws RemoteException
{
}
} //end class

Any Further Queries, let me know.

[denisdoherty]

that has compiled now thanks very much.

[javarishi]

Ok Good. Always welcome for good Questions. We all should learn and

improve. Try to read the book which i have suggested.