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Displaying Hello using RMI
Posted on: September 29, 2008 at 12:00 AM

This Example describes the way to display Hello message using RMI. By RMI we mean Remote Method Invocation. RMI serves as a basic technique for supporting distributed objects in java.

Displaying Hello using RMI

This Example describes the way to display Hello message using RMI. By RMI we mean Remote Method Invocation. RMI serves as a basic technique for supporting distributed objects in java. The steps involved in displaying message Hello are described below:-

Step1.Create a Remote interface named HelloInterface.java in the Directory.

HelloInterface.java:-


import java.rmi.*;


public interface HelloInterface extends Remote {

  public String say() throws RemoteException;

}

Step2.Create an Remote Class implementation for HelloWorld named Hello.java in the Directory.

Hello.java


import java.rmi.*;

import java.rmi.server.*;



public class Hello extends UnicastRemoteObject 

 implements HelloInterface {

  private String message;

  public Hello (String msg) throws RemoteException {

  message = msg;

  }

  public String say() throws RemoteException {

  return message;

  }

}

Step3.Compile the above two Source file named HelloInterface.java and Hello.java.

Step4.After compiling the above two classes type the following command i.e-"rmic Hello" in console just like displayed below.

Your Directory Structure will be like this.By running the "rmic Hello" command a new class will be created i.e "Hello_Stub.class" in the directory

Step5.Create Server application named HelloServer.java

HelloServer.java

import java.rmi.Naming;

              

public class HelloServer 

{

  public static void main (String[] argv) 

  {

  try {

  Naming.rebind 

   ("Hello", new Hello ("Hello,From Roseindia.net pvt ltd!"));

  System.out.println 

  ("Server is connected and ready for operation.");

  } 

  catch (Exception e) {

  System.out.println ("Server not connected: " + e);

  }

  }

}

Step6.Create Client application named HelloClient.java

HelloClient.java

import java.rmi.Naming;

              

public class HelloClient 

{

  public static void main (String[] argv) {

  try {

			HelloInterface hello =(HelloInterface)

			 Naming.lookup ("//192.168.10.201/Hello");

  System.out.println (hello.say());

  } 

  catch (Exception e){

  System.out.println ("HelloClient exception: " + e);}

  }

}

Step6.Compile both of the files.

Step7.Type "rmicregistry" on commandprompt and press ENTER.

Step8.Type java HelloServer in commandprompt and press ENTER.The following message will be displayed on console.

Step9.Now,open another separate command terminal,and run the client application like shown in the figure given below:-

Step10. If the message similar to the above appears in figure comes means that you have implemented your RMI application.

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