programming-examples/java/IPC Client Server Program.java

// IPC CLient Program

import java.net.*;
import java.io.*;
public class IPCClient
{
    public static void main(String args[])
    {
        try
            {
                Socket s=new Socket("localhost",3128);
                DataOutputStream dos=new DataOutputStream(s.getOutputStream());
                DataInputStream dis=new DataInputStream(s.getInputStream());
                InputStreamReader isr=new InputStreamReader(System.in);
                System.out.println("......Client PROCESS STARTED....");
                System.out.println("Enter the value of 1 and 2 to pass the server process");
                BufferedReader br=new BufferedReader(isr);
                int a=Integer.parseInt(br.readLine());
                System.out.println("\Number 1="+a);
                dos.writeInt(+a);
                int b=Integer.parseInt(br.readLine());
                System.out.println("\Number 2="+b);
                dos.writeInt(+b);
                int result=dis.readInt();
                System.out.println("Client Process has receieved result from server\n..");
                s.close();
            }
        catch(Exception e)
            {
                System.out.println("Exception "+e);
            }
    }
}

//IPC Server

import java.net.*;
import java.io.*;
public class IPCServer
{
    public static void main(String args[])
    {
        System.out.println("......INTERPROCESS COMMUNICATION....");
        System.out.println("......SERVER PROCESS STARTED....");
        System.out.println("......SERVER IS READY AND WAITING TO RECEIVE DATA FROM CLIENT FROM PORT...."+3128);
        try
            {
                ServerSocket ss=new ServerSocket(3128);
                Socket clientSocket=ss.accept();
                System.out.println("Client is connected with IP Address"+clientSocket.getInetAddress()+"And Port no"+clientSocket.getPort());
                DataOutputStream dos=new DataOutputStream(clientSocket.getOutputStream());
                DataInputStream dis=new DataInputStream(clientSocket.getInputStream());
                int a=dis.readInt();
                System.out.println("Server recievd");
                System.out.println("\Number 1="+a);
                int b=dis.readInt();
                System.out.println("\Number 2="+b);
                int c=a+b;
                dos.writeInt(c);
                System.out.println("Server Process has executed..Requested process and sent result"+c+"To the Client\n");
                clientSocket.close();
            }
        catch(Exception e)
            {
                System.out.println("Exception "+e);
            }
    }
}