Java Networking की मूल बातें

// Import java.net.InetAddress so it can be used by its short name
import java.net.InetAddress;
// Import java.net.URL so it can be used by its short name
import java.net.URL;
// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) throws Exception {
		InetAddress address = InetAddress.getByName("127.0.0.1");
		// Create a new URL object and store it in url
		URL url = new URL("https://example.com/page");
		// Print a line to the console
		System.out.println(address.getHostAddress() + " " + url.getHost());
	}
}

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// Import java.net.URLConnection so it can be used by its short name
import java.net.URLConnection;
// Import java.io.* so it can be used by its short name
import java.io.*;
// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) throws Exception {
		// Create a new File object and store it in file
		File file = new File("page.txt");
		// Try code that might throw an exception
		try (PrintWriter out = new PrintWriter(file)) { out.print("sample content"); }
		URLConnection conn = file.toURI().toURL().openConnection();
		// Try code that might throw an exception
		try (InputStream in = conn.getInputStream()) {
			// Print a line to the console
			System.out.println(new String(in.readAllBytes()));
		}
		file.delete();
	}
}

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import java.net.URI;
import java.net.URL;
public class Main {
	public static void main(String[] args) throws Exception {
		URI uri = new URI("https://example.com/page"); // validated more strictly
		URL url = uri.toURL(); // converted only when actually needed
		System.out.println(uri + " -> " + url);
	}
}

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import java.net.*;
public class Main {
	public static void main(String[] args) throws Exception {
		Socket tcpSocket = new Socket(); // TCP -- reliable, ordered
		DatagramSocket udpSocket = new DatagramSocket(); // UDP -- lightweight, connectionless
		System.out.println("TCP and UDP sockets created");
		udpSocket.close();
	}
}

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import java.net.InetAddress;
public class Main {
	public static void main(String[] args) throws Exception {
		InetAddress address = InetAddress.getByName("localhost");
		System.out.println(address.getHostAddress()); // same DNS-style lookup a browser performs
	}
}

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