socket programming in java | java network programming tutorial

socket programming in java:

If you are just starting Network or Socket programming java, you should visit this first

How to establish a connection between client and server using Socket Programming

Let's Continue with our Topic

Today we will create a connection between client and server such that Client and Server both will sending and receiving data from each other. When anyone ( Client or Server) receives any data they will invert the data and Print that on the console.

Source Code For Server:- MyServer.java

FileName Should be MyServer.java

import java.net.*;
import java.io.*;

 class MyClass{
    public String invert(String st){
        
        StringBuilder sb =new StringBuilder();
        for(int i=0;i<st.length();i++){
            char c = st.charAt(i);
            int temp = (int) c;
            if(temp <= 90 && temp >= 65 )
                temp= temp + 32;
                            
            
            else if(temp <= 122 && temp >= 97 )
                temp= temp - 32;
            
            c=(char) temp;
            sb.append(c);
        }
        st=sb.toString();
        return st;
    }
    
}
public class MyServer {

    public static void main(String args[]) throws IOException {
        ServerSocket s = new ServerSocket(50136);
        Socket s1 = s.accept();
        
        System.out.println("Sever is connected to client");
        //Server is sending data
        DataOutputStream dos = new DataOutputStream(s1.getOutputStream());
        dos.writeUTF("Hi There ,i am server");
        //Server is Recieving the data
        DataInputStream dis = new DataInputStream(s1.getInputStream());
        String st = new String(dis.readUTF());
        MyClass ob = new MyClass();
        st = ob.invert(st);
        System.out.println(st);
        dos.close();
        s1.close();
        s.close();

    }

}

Source Code For Client:- MyClient.java

FileName Should be MyServer.java

import java.net.*;
import java.io.*;
public class MyClient {
    public static void main(String args[]) throws IOException{
        Socket s1= new Socket("localhost",50125);
        
        System.out.println("Connection established");
        DataInputStream dis = new DataInputStream(s1.getInputStream());
        String st = new String(dis.readUTF());
        MyClass ob = new MyClass();
        st = ob.invert(st);
        System.out.println(st);
        //Client is sending data
        DataOutputStream dos = new DataOutputStream(s1.getOutputStream());
        dos.writeUTF("Hi There ,i am Client");        
        dis.close();
        
        s1.close();
    }
}

output of the above program:-

Final Word:-

In this article, We have shown you about the "Today we have created a connection between client and server such that Client and Server both will send and receive data from each other. When anyone ( Client or Server) receives any data they will invert the data and Print that on the console.".We hope you like it

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socket programming in java | java network programming tutorial | tech with code