[JAVA] CAMERA

import com.github.sarxos.webcam.Webcam;

    import javax.imageio.ImageIO;

    import java.io.File;

    import java.io.IOException;

    public class CameraExample {

        public static void main(String[] args) throws IOException {

            Webcam webcam = Webcam.getDefault();

            webcam.open();

            ImageIO.write(webcam.getImage(), "PNG", new File("capture.png"));

            webcam.close();

        }

    }

[JAVA] VOLUME AUDIO

import javax.sound.sampled.*;

public class VolumeControl {

    public static void main(String[] args) {

        try {

            // Load an audio file

            AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(VolumeControl.class.getResource("audio.wav"));

            // Get a clip

            Clip clip = AudioSystem.getClip();

            // Open the clip

            clip.open(audioInputStream);

            // Get the master gain control

            FloatControl gainControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);

            // Set the volume (example: 50% of the maximum)

            float maxGain = gainControl.getMaximum();

            float minGain = gainControl.getMinimum();

            float range = maxGain - minGain;

            float volume = minGain + (range * 0.5f); // 50%

            gainControl.setValue(volume);

            // Start playing

            clip.start();

            // Keep the program running while the audio plays

            Thread.sleep(clip.getMicrosecondLength() / 1000);

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

[JAVA] PROVIDER

    LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

    if (locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {

        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);

    }

[JAVA] PROXY

   Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("proxy_host_name", proxy_port_number));

    URL url = new URL("your_url");

    URLConnection urlConnection = url.openConnection(proxy);

[JAVA] READ HEX from File

import java.io.FileInputStream;

import java.io.IOException;

public class HexFileReader {

    public static byte[] readFileBytes(String filePath) throws IOException {

        FileInputStream fis = new FileInputStream(filePath);

        byte[] fileBytes = fis.readAllBytes();

        fis.close();

        return fileBytes;

    }

    public static String bytesToHex(byte[] bytes) {

      StringBuilder hexString = new StringBuilder();

      for (byte b : bytes) {

          hexString.append(String.format("%02x", b & 0xFF));

      }

      return hexString.toString();

    }

    public static void main(String[] args) {

        String filePath = "path/to/your/file.txt"; // Replace with your file path

        try {

            byte[] fileBytes = readFileBytes(filePath);

            String hexString = bytesToHex(fileBytes);

            System.out.println("Hexadecimal representation:\n" + hexString);

        } catch (IOException e) {

            System.err.println("Error reading file: " + e.getMessage());

        }

    }

}

[JAVA] HEX from File

import java.io.FileInputStream;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Paths;

import org.apache.commons.codec.binary.Hex;

public class HexFileUtil {

    public static void main(String[] args) {

        String filePath = "path/to/your/file.txt";

        try {

            // Example 1: Read and convert hex string to byte array

            String hexString = Files.readString(Paths.get(filePath)).trim();

            byte[] byteArray = hexStringToByteArray(hexString);

            System.out.println("Byte array from hex string: " + java.util.Arrays.toString(byteArray));

            // Example 2: Read file as bytes and convert to hex string

            byte[] fileBytes = Files.readAllBytes(Paths.get(filePath));

            String hexStringFromFile = byteArrayToHexString(fileBytes);

            System.out.println("Hex string from file bytes: " + hexStringFromFile);

             // Example 3: Read file as bytes and convert to hex string using Apache Commons Codec

             byte[] fileBytes2 = Files.readAllBytes(Paths.get(filePath));

             String hexStringFromBytes = Hex.encodeHexString(fileBytes2);

             System.out.println("Hex string from file bytes using Apache Commons Codec: " + hexStringFromBytes);

            // Example 4: Read file and print it in hex representation using FileInputStream

            printHexStream(new FileInputStream(filePath), 16);

        } catch (IOException e) {

            System.err.println("Error reading file: " + e.getMessage());

        }

    }

    public static void printHexStream(final FileInputStream inputStream, final int numberOfColumns) throws IOException{

         long streamPtr=0;

         while (inputStream.available() > 0) {

             final long col = streamPtr++ % numberOfColumns;

             System.out.printf("%02x ",inputStream.read());

             if (col == (numberOfColumns-1)) {

                 System.out.printf("\n");

             }

         }

    }

    public static byte[] hexStringToByteArray(String hexString) {

        int len = hexString.length();

        byte[] data = new byte[len / 2];

        for (int i = 0; i < len; i += 2) {

            data[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4)

                                 + Character.digit(hexString.charAt(i + 1), 16));

        }

        return data;

    }

    public static String byteArrayToHexString(byte[] bytes) {

        StringBuilder sb = new StringBuilder();

        for (byte b : bytes) {

            sb.append(String.format("%02x", b));

        }

        return sb.toString();

    }

}

[JAVA] PRINT DATA

import java.awt.*;

import java.awt.print.*;

public class PrintExample implements Printable {

    public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {

        if (pageIndex > 0) {

            return NO_SUCH_PAGE;

        }

        Graphics2D g2d = (Graphics2D) graphics;

        g2d.drawString("Hello, Printer!", 100, 100);

        return PAGE_EXISTS;

    }

    public static void main(String[] args) {

        PrinterJob printerJob = PrinterJob.getPrinterJob();

        PrintService[] services = PrinterJob.lookupPrintServices();

        if (services.length > 0) {

            try {

                printerJob.setPrintService(services[0]);

                printerJob.setPrintable(new PrintExample());

                if (printerJob.printDialog()) {

                    printerJob.print();

                }

            } catch (PrinterException e) {

                e.printStackTrace();

            }

        } else {

            System.out.println("No printers found.");

        }

    }

}