ToHash.java

// https://www.quickprogrammingtips.com/java/how-to-generate-sha256-hash-in-java.html
// Class to create a SHA256 hash to a String

import java.security.MessageDigest;

public class ToHash {
  public static String applyHash(String input) {
    try {
      MessageDigest digest = MessageDigest.getInstance("SHA-256");
      byte[] hash = digest.digest(input.getBytes("UTF-8"));
      return bytesToHex(hash);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  // Converting the hash to a String
  private static String bytesToHex(byte[] hash) {
    StringBuffer hexString = new StringBuffer();
    for (int i = 0; i < hash.length; i++) {
      String hex = Integer.toHexString(0xff & hash[i]);
      if (hex.length() == 1) {
        hexString.append('0');
      }
      hexString.append(hex);
    }
    return hexString.toString();
  }
}