[JAVA] CREATE WEB DOMAIN SERVER

URL link in Java, you can utilize the java.net.URL class, which represents a Uniform Resource Locator. Here's how you can work with URLs in Java:

1. Creating a URL Object:

• You can create a URL object by providing a string representation of the URL.
• Example:

Java

     try {
         URL url = new URL("http://www.example.com");
     } catch (MalformedURLException e) {
         // Handle the exception if the URL is invalid
         e.printStackTrace();
     }

• It's recommended to use java.net.URI to parse or construct a URL instead of the deprecated URL constructors.

2. Connecting to the URL:

• To establish a connection, use the openConnection() method of the URL object, which returns a URLConnection object.
• Example:

Java

     try {
         URL url = new URL("http://www.example.com");
         URLConnection connection = url.openConnection();
         connection.connect(); // Initiates the connection
     } catch (MalformedURLException | IOException e) {
         e.printStackTrace();
     }

3. Reading Data from the URL:

• You can read data from the URL using the getInputStream() method of the URLConnection object, which returns an InputStream.
• Example:

Java

     try {
         URL url = new URL("http://www.example.com");
         URL page2URL = new URL(url, "page2.html");

URLConnection connection = url.openConnection();
         InputStream inputStream = connection.getInputStream();
         BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
         String line;
         while ((line = reader.readLine()) != null) {
             System.out.println(line);
         }
         reader.close();
         inputStream.close();
     } catch (MalformedURLException | IOException e) {
         e.printStackTrace();
     }

4. Sending HTTP Requests:

• For more advanced interactions like sending HTTP GET or POST requests, use HttpURLConnection.
• Example:

Java

     try {
         URL url = new URL("http://www.example.com/api");
         HttpURLConnection connection = (HttpURLConnection) url.openConnection();
         connection.setRequestMethod("GET"); // Or "POST"
         int responseCode = connection.getResponseCode();
         if (responseCode == HttpURLConnection.HTTP_OK) {
             // Read response
         }
         connection.disconnect();
     } catch (MalformedURLException | IOException e) {
         e.printStackTrace();
     }

• Set request properties using setRequestProperty() and handle the response accordingly.

5. Other URL Operations:

• You can obtain different parts of the URL such as the protocol, host, port, and file using methods like getProtocol(), getHost(), getPort(), and getFile().
• You can also extract the reference part (fragment) of the URL using getRef().

6. Working with Local Files:

• To use a local file as a URL, you can create a URL object using the file path.
• Example:

Java

     try {
         URL fileUrl = new URL("file:///path/to/your/file.txt");
     } catch (MalformedURLException e) {
         e.printStackTrace();
     }

• Be mindful of path separators and character escaping when dealing with local files.

Important Considerations:

• Remember to handle MalformedURLException when creating URL objects, and IOException when connecting to or reading from URLs.
• Consider using libraries like Apache HttpClient for more robust HTTP interactions.
• When working with server-side applications, web servers like Apache Tomcat can be used to handle requests.

[JAVA] EMAIL SEND

import java.util.Properties;

import javax.mail.*;

import javax.mail.internet.*;

public class EmailSender {

    public static void main(String[] args) {

        String to = "recipient@example.com";

        String from = "sender@example.com";

        String host = "smtp.example.com";

        String username = "your_username";

        String password = "your_password";

        Properties properties = new Properties();

        properties.put("mail.smtp.host", host);

        properties.put("mail.smtp.port", "587"); // or 465 for SSL

        properties.put("mail.smtp.auth", "true");

        properties.put("mail.smtp.starttls.enable", "true"); // for TLS

        Session session = Session.getInstance(properties, new Authenticator() {

            protected PasswordAuthentication getPasswordAuthentication() {

                return new PasswordAuthentication(username, password);

            }

        });

        try {

            MimeMessage message = new MimeMessage(session);

            message.setFrom(new InternetAddress(from));

            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));

            message.setSubject("Test Email");

            message.setText("This is a test email.");

            Transport.send(message);

            System.out.println("Email sent successfully!");

        } catch (MessagingException e) {

            e.printStackTrace();

        }

    }

}

[JAVA] INHERITANCE

class Animal {

    String name;

    public void eat() {

        System.out.println("Animal is eating");

    }

}

class Dog extends Animal {

    public void bark() {

        System.out.println("Dog is barking");

    }

}

public class Main {

    public static void main(String[] args) {

        Dog dog = new Dog();

        dog.name = "Buddy";

        dog.eat(); // Inherited from Animal

        dog.bark(); // Specific to Dog

    }

}

[JAVA] PAINT EXAMPLE SIMPLE

import java.util.Arrays;

public class SortString {

    public static void main(String[] args) {

        String inputString = "javaexample";

        char[] charArray = inputString.toCharArray();

        Arrays.sort(charArray);

        String sortedString = new String(charArray);

        System.out.println("Original String: " + inputString);

        System.out.println("Sorted String: " + sortedString);

    }

}

[JAVA] PAUSE AUDIO

import javax.sound.sampled.*;

import java.io.File;

import java.io.IOException;

public class AudioPlayer {

    private Clip clip;

    private long clipTime;

    public void loadAudio(String filePath) throws LineUnavailableException, IOException, UnsupportedAudioFileException {

        File audioFile = new File(filePath);

        AudioInputStream audioStream = AudioSystem.getAudioInputStream(audioFile);

        clip = AudioSystem.getClip();

        clip.open(audioStream);

    }

    public void play() {

        clip.start();

    }

    public void pause() {

        clipTime = clip.getMicrosecondPosition();

        clip.stop();

    }

    public void resume() {

        clip.setMicrosecondPosition(clipTime);

        clip.start();

    }

    public void stop() {

        clip.stop();

        clip.close();

    }

    public static void main(String[] args) {

        AudioPlayer player = new AudioPlayer();

        try {

            player.loadAudio("path/to/your/audio.wav"); // Replace with your audio file path

            player.play();

            // Simulate pausing after 2 seconds

            Thread.sleep(2000);

            player.pause();

            System.out.println("Audio paused");

            // Simulate resuming after 2 seconds

            Thread.sleep(2000);

            player.resume();

            System.out.println("Audio resumed");

            // Let the audio play for 5 seconds

            Thread.sleep(5000);

            player.stop();

            System.out.println("Audio stopped");

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

[JAVA] SORT by A to Z from String

import java.util.Arrays;

public class SortString {

    public static void main(String[] args) {

        String inputString = "javaexample";

        char[] charArray = inputString.toCharArray();

        Arrays.sort(charArray);

        String sortedString = new String(charArray);

        System.out.println("Original String: " + inputString);

        System.out.println("Sorted String: " + sortedString);

    }

}

[JAVA] JAVA AUTO DRAWING IMAGE FROM IMAGE

import javax.imageio.ImageIO;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

public class AutoDrawImage {

    public static void main(String[] args) {

        try {

            // Load the source image

            BufferedImage sourceImage = ImageIO.read(new File("path/to/your/source/image.jpg"));

            // Create a destination image

            BufferedImage destinationImage = new BufferedImage(sourceImage.getWidth(), sourceImage.getHeight(), BufferedImage.TYPE_INT_ARGB);

            // Get the graphics context

            Graphics2D g2d = destinationImage.createGraphics();

            // Draw the source image onto the destination

            g2d.drawImage(sourceImage, 0, 0, null);

            g2d.dispose();

            // Save the result

            ImageIO.write(destinationImage, "png", new File("path/to/your/output/image.png"));

            System.out.println("Image drawn and saved successfully!");

        } catch (IOException e) {

            System.out.println("Error: " + e.getMessage());

        }

    }

}