// LoginRmi Interfacepublicinterface LoginRMI extends java.rmi.Remote
{
    int checklogin(String loginname) throws java.rmi.RemoteException,Exception;
    int checkpassword(String loginname,String password) throws java.rmi.RemoteException,Exception;
}


// LoginRMIImpl.java, LoginRMI implementation

import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
import java.io.*;

publicclass LoginRMIImpl extends UnicastRemoteObject implements LoginRMI
{
    private FileReader fr;
    private BufferedReader br;
    String s,s1,s2;
    int index,retval;
  public LoginRMIImpl(String name) throws RemoteException
  {
    super();
    try
    {
      Naming.rebind(name, this);
    } catch (Exception e)
    { System.out.println("Exception: " + e.getMessage());
      e.printStackTrace();
    }
  }

  publicint checklogin(String loginname) throws RemoteException,Exception
  { 
    fr = new FileReader("logindetails.txt");
    br = new BufferedReader(fr);
    retval = 0;
            
    while(( s = br.readLine())!=null && retval != 1)
    {
        index = s.indexOf(" ");
        s1 = s.substring(0,index);
        if(s1.equals(loginname))
        {
            retval = 1;
        }
        else
        {
            retval = 0;
        }
    }
    fr.close();
    return retval;
            
  }

 publicint checkpassword(String loginname,String password) throws RemoteException,Exception
  { 
    fr = new FileReader("logindetails.txt");
    br = new BufferedReader(fr);
    retval = 0;
    while((s = br.readLine())!=null && retval !=1)
    {
        index = s.indexOf(" ");
        s1 = s.substring(0,index);
        s2 = s.substring(index+1);
        if(s1.equals(loginname) && s2.equals(password))
        {
            retval = 1;
        }
        else
        {
            retval = 0;
        }
    }
    fr.close();
    return retval;
                
  }


}


// LoginRMIServer.java

import java.rmi.*;
import java.rmi.server.*;

publicclass LoginRMIServer
{

 publicstaticvoid main(String args[])
 {

   // Create and install the security manager
   System.setSecurityManager(new RMISecurityManager());

   try
   {
     // Create LoginRMIImpl
     LoginRMIImpl myLogin = new LoginRMIImpl("//Binita/myLoginRMI");
     System.out.println("LoginRMI Server ready.");
   } catch (Exception e)
   { System.out.println("Exception: " + e.getMessage());
     e.printStackTrace();
   }
 }
}


// LoginRMIClient.java  RMI Login client

import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.server.*;
import java.lang.*;
import java.io.*;

publicclass LoginRMIClient
{ 
  publicstaticvoid main(String args[])
  { 
    // Create and install the security manager
    System.setSecurityManager(new RMISecurityManager());
    int status=0;
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String name,name1;
    try
    { 
    LoginRMI myLogin = (LoginRMI)Naming.lookup("//"
                          + args[0] + "/" + "myLoginRMI");
    System.out.println("Enter loginname :");
    name = in.readLine();      
    status = myLogin.checklogin(name);
    
    if(status == 1)
    {
        System.out.println("Enter password:");
        name1 = in.readLine();    
        status = myLogin.checkpassword(name,name1);
        if(status == 1)
        {
            System.out.println("Successfully login.....");
        }
        else
        {
            System.out.println("You have Entered wrong password");
        }
    }
    else
    {
        System.out.println("You have entered wrong login name");
    }

    } catch(Exception e)
    { System.err.println("System Exception" + e);
    }
   System.exit(0);
  }
}


// OUTPUT

-----  logindetails.txt  ------

binita modi
rasesh patel
dipen shah
krupa parikh
--------------------


Enter loginname :
krupa
Enter password:
modi
You have Entered wrong password


Enter loginname :
binita
Enter password:
modi
Successfully login.....


Enter loginname :
nauka
You have entered wrong login name