How do I establish a socket connection in Java?

How do I establish a socket connection in Java?

To establish a socket connection in Java, you can use the Socket class. Here's a simple example:

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

public class Client {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost", 8080);
            System.out.println("Connected to server!");
            // You can now use input/output streams to communicate with the server.
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

What if I want to create a server socket instead?

To create a server socket, you can use the ServerSocket class. Here's an example:

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

public class Server {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(8080);
            System.out.println("Server is listening on port 8080...");
            Socket socket = serverSocket.accept();
            System.out.println("Client connected!");
            // Handle client communication here.
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

How can I handle multiple clients?

To handle multiple clients, you can create a new thread for each client connection. Here's a basic example:

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

public class MultiClientServer {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(8080);
            System.out.println("Server is listening on port 8080...");
            while (true) {
                Socket socket = serverSocket.accept();
                new ClientHandler(socket).start();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

class ClientHandler extends Thread {
    private Socket socket;

    public ClientHandler(Socket socket) {
        this.socket = socket;
    }

    public void run() {
        // Handle client communication here.
    }
}```