How to access data in the remote system

Question

Hi everybody,
I have developed four classes.
FileInterface.java:-
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface FileInterface extends Remote {
public byte[] downloadFile(String fileName) throws
RemoteException;
FileServer.java:-
import java.io.*;
import java.rmi.*;
public class FileServer {
public static void main(String argv[]) {
if(System.getSecurityManager() == null) {
System.setSecurityManager(new RMISecurityManager());
try {
FileInterface fi = new FileImpl("FileServer");
Naming.rebind("//10.161.15.219/FileServer", fi);
} catch(Exception e) {
System.out.println("FileServer: "+e.getMessage());
e.printStackTrace();
FileImpl.java:-
import java.io.*;
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
public class FileImpl extends UnicastRemoteObject
implements FileInterface {
private String name;
public FileImpl(String s) throws RemoteException{
super();
name = s;
public byte[] downloadFile(String fileName){
try {
File file = new File(fileName);
byte buffer[] = new byte[(int)file.length()];
BufferedInputStream input = new
BufferedInputStream(new FileInputStream(fileName));
input.read(buffer,0,buffer.length);
input.close();
return(buffer);
} catch(Exception e){
System.out.println("FileImpl: "+e.getMessage());
e.printStackTrace();
return(null);
FileClient.java:-
import java.io.*;
import java.rmi.*;
public class FileClient{
public static void main(String argv[]) {
if(argv.length != 2) {
System.out.println("Usage: java FileClient fileName machineName");
System.exit(0);
try {
String name = "//" + argv[1] + "/FileServer";
FileInterface fi = (FileInterface) Naming.lookup(name);
byte[] filedata = fi.downloadFile(argv[0]);
File file = new File(argv[0]);
BufferedOutputStream output = new
BufferedOutputStream(new FileOutputStream(file.getName()));
output.write(filedata,0,filedata.length);
output.flush();
output.close();
} catch(Exception e) {
System.err.println("FileServer exception: "+ e.getMessage());
e.printStackTrace();
After that when i compile classes when i give the command as
rmic FileImpl
in command prompt error is coming like this.
error: Class FileImpl not found.
1 error
Can anyone help me please,urgent.

Answer 1

It is generating stub and skeleton classes but when iam running FileClient after starting rmiregistry,it is coming something like
FileServer exception: FileServer
java.rmi.NotBoundException: FileServer
     at sun.rmi.registry.RegistryImpl.lookup(RegistryImpl.java:106)
     at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
     at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:375)
     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:240)
     at sun.rmi.transport.Transport$1.run(Transport.java:153)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
     at java.lang.Thread.run(Thread.java:595)
     at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:343)
     at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
     at java.rmi.Naming.lookup(Naming.java:84)
     at FileClient.main(FileClient.java:9)
Can u help me