RMI Program Code and Example:

CLICK HERE for step by step learning with description of each step
To run program of RMI in java is quite difficult, Here I am going to give you four different programs in RMI to add two integer numbers.
First program is for declare a method in an interface.
Second Program is for implementing this method and logic.
Third program is for server side.
And last one is for client side.
At the last I will give steps to run this program in one system.
Calculator.java

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import java.rmi.Remote; import java.rmi.RemoteException;   public interface Calculator extends Remote {     public long add(long a,long b) throws RemoteException; }

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CalculatorImpl.java

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import java.rmi.RemoteException; import java.rmi.server.UnicastRemoteObject;   public class CalculatorImpl extends UnicastRemoteObject implements Calculator {     protected CalculatorImpl() throws RemoteException     {         super();     }     public long add(long a, long b) throws RemoteException     {         return a+b;     } }

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CalculatorServer.java

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import java.rmi.Naming;   public class CalculatorServer {     CalculatorServer()     {         try         {             Calculator c = new CalculatorImpl();             Naming.rebind("rmi://127.0.0.1:1099/CalculatorService", c);         }         catch (Exception e)         {             e.printStackTrace();         }     }     public static void main(String[] args)     {         new CalculatorServer();     } }

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CalculatorClient.java

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import java.rmi.Naming;   public class CalculatorClient {     public static void main(String[] args)     {         try         {             Calculator c = (Calculator) Naming.lookup("//127.0.0.1:1099/CalculatorService");             System.out.println("addition : "+c.add(10, 15));         }         catch (Exception e)         {             System.out.println(e);         }     } }

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Steps to run this programs:

 

First of all put these four programs inside bin folder of JDK.

 

As an example suppose our JDK folder is inside java folder in drive D:

 

Now open command prompt and do following steps.

 

cd\

 

d:

 

cd Java\jdk1.6.0_23\bin

 

javac Calculator.java

 

javac CalculatorImpl.java

 

javac CalculatorServer.java

 

javac CalculatorClient.java

 

rmic CalculatorImpl

 

start rmiregistry

 

java CalculatorServer

 

open another cmd and again go to same path d:\Java\jdk1.6.0_23\bin

 

java CalculatorClient

Output: