Demonstration Of RMI Registry, RMI Interface In Java.

RMI Registry, RMI Interface

Client:

 
import java.rmi.*; 
import java.awt.*; 
import java.awt.event.*; 
import java.io.*; 
import javax.swing.*; 
 
public class Client extends JFrame 
 { 
    TextField t1 = new TextField(30); 
    TextField t2 = new TextField(30); 
    Label rs = new Label("Sum= 0"); 
    JButton b = new JButton("Add"); 
    Panel p = new Panel(new GridLayout(4, 1, 5, 5)); 
  RemoteInterface s; 
 
  public Client() 
 { 
  super("Client Side"); 
    setSize(250, 250); 
  setLocation(300, 300); 
  getContentPane().add(p, "North"); 
  p.add(t1); 
  p.add(t2); 
  p.add(rs); 
  p.add(b); 
 
  try  
{ 
  String ipp = JOptionPane 
  .showInputDialog("Please enter the IP Address to Connect"); 
  String ip = "rmi://" + ipp + "/RMIAPPLICATION"; 
  s = (RemoteInterface) Naming.lookup(ip); 
 
  } 
 catch (Exception exp) 
 { 
  JOptionPane.showMessageDialog(null, exp.getMessage()); 
  } 
 
  b.addActionListener(new ActionListener() 
 { 
    public void actionPerformed(ActionEvent evt)   
 { 
      int a = Integer.parseInt(t1.getText()); 
      int b = Integer.parseInt(t2.getText()); 
      try 
 { 
  int r = s.add(a, b); 
  rs.setText("Sum of two no =" + r); 
      } 
 catch (Exception epx) 
 {   
  } 
  } 
  }); 
  } 
 
  public static void main(String args[]) 
 { 
  Client c = new Client(); 
    c.setDefaultCloseOperation(EXIT_ON_CLOSE); 
    c.setVisible(true); 
  } 
} 
 

Remote Interface

 
import java.rmi.*; 
public interface RemoteInterface extends Remote 
{ 
  public int add(int x,int y)throws Exception; 
} 
 

Server:

 
import java.rmi.*; 
import java.net.*; 
 
public class Server 
 { 
    public static void main(String args[]) 
 { 
      Try { 
        ServerImplements s = new ServerImplements(); 
 Naming.rebind("RMIAPPLICATION", s); 
        System.out.println("Server has been started"); 
  } 
 catch (Exception e) { 
  System.out.println(e.getMessage()); 
      } 
      } 
} 
 

Server Implements:

 
import java.rmi.*; 
import java.rmi.server.*; 
import java.lang.String; 
 
interface RemoteInterface extends Remote 
 { 
    public int add(int x, int y) throws Exception; 
 } 
public class ServerImplements extends UnicastRemoteObject implements RemoteInterface 
 { 
    public ServerImplements() throws Exception 
 { 
  super(); 
    } 
  public int add(int x, int y) 
 { 
  return (x + y); 
    } 
 }