sha1

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Scanner;

public class SHA1HashExample {

public static String calculateSHA1(String input) {
    try {
        // Create a MessageDigest instance for SHA-1
        MessageDigest md = MessageDigest.getInstance("SHA-1");

        // Calculate the digest
        byte[] messageDigest = md.digest(input.getBytes());

        // Convert byte array into hex representation
        StringBuilder hexString = new StringBuilder();
        for (byte b : messageDigest) {
            hexString.append(String.format("%02x", b)); // lower-case hex
        }

        return hexString.toString();

    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("SHA-1 algorithm not found");
    }
}

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter text to hash using SHA-1: ");
    String input = sc.nextLine();

    String sha1Hash = calculateSHA1(input);

    System.out.println("SHA-1 Hash: " + sha1Hash);
}

}