simple Java client server Connection tutorial based on Screenshot [ part 1 ]

1.simple Java client server Connection tutorial based on Screenshot [ part 1 ] 2.Java client server Connection tutorial based on Screenshot [ part 2 ] , sending message from client to server 3. Socket programming using c++ (Connection Establishment) 4.Socket programming using java ,Netbeans

This tutorial is just describing about the client server connection Establishment
so what are the things we need
1.Linux OS/Win OS
2.TextEditor:
 gedit/Notepad
3.Terminal/Command prompt
4.java
Now what i'm using is linux mint,gedit,terminal,java

Step 1
-----------------------

first open gedit

 

Step 2

Now copy paste this

       
    import java.io.*;
    import java.net.*;
    public class Client {
    public static void main(String []args) throws IOException{
    Socket sckt=new Socket("localhost",3000);
    }}
       
 

and save it Client.java in "/Documents" folder

Now open New file
copy paste

       
import java.io.*;
import java.net.*;
public class Server{
public static void main (String args[]) throws IOException
{
ServerSocket sc=new ServerSocket(3000);
System.out.println("waiting for client");
Socket clntS=sc.accept();
System.out.println("client conneted");
}
}
       
 

and save it Server.java in "/Documents " folder

this program runs with same computer i.e
server and client is in a computer itself  

  ***************************************************************************
open two terminal

type in first terminal

       

cd ~/Documents/

javac Server.java
 
      
 

//for compile java class

       

java Server
 
      
 

type in second terminal

       

cd ~/Documents
javac Client.java

      
 

//for compile java file

       

java Client

      
 

RUN Server.java

RUN Client.java

So how to connect two computers?
--------------------------------------------------------------
Here we put localhost ,which is the address of server
if we want connect two computer
within same network then
 put ip address
that is,
for example
-----------------------
our Hostel is networked
so my ip address is 192.168.1.15
Now you are confusing with ip address .
How to get ip address?
just type "ifconfig" in Terminal then enter

for windows type "ipconfig/all" then enter

and my neighbour is with 192.168.1.16
Consider ,i'm server and i execute "server.java"
then
my nieghbour will be client he execute "Client.java"
so my neighbour should write code
//Socket sckt=new Socket("192.168.1.15",3000);//

Posted in: SOCKET PROGRAMMING