How to add Java Library inside Oracle EBS r11 in order to use Java script in SQL

Question

I have a java script and want to use it in SQL oracle but don't know how and where to add the 3rd java library in the server.

I found one folder name lib

Is it the right folder or there is another folder I can Idd? which I have the .jar file need to add

I wrote a java code to sign a file from Starkbank library and in order to be able to us the java code I have to add starkbank library java file

import com.starkbank.ellipticcurve.PrivateKey;
import com.starkbank.ellipticcurve.PublicKey;
import com.starkbank.ellipticcurve.Signature;
import com.starkbank.ellipticcurve.Ecdsa;
import com.starkbank.ellipticcurve.Ecdsa;
import com.starkbank.ellipticcurve.PublicKey;
import com.starkbank.ellipticcurve.Signature;
import com.starkbank.ellipticcurve.utils.ByteString;
import com.starkbank.ellipticcurve.utils.File;
import java.util.*;

public class NewClass3{

    public static void main(String[] args){
        
        // Read files
       // String publicKeyPem = File.read("publicKey.pem");
        
        String PrivKeyPem = File.read("ec-secp256k1-priv-key.pem");



      //  PublicKey publicKey = PublicKey.fromPem(publicKeyPem);
       
        PrivateKey privateKey = PrivateKey.fromPem(PrivKeyPem);
        
          
    Base64.Encoder enc = Base64.getEncoder();
        Base64.Decoder dec = Base64.getDecoder();
        
    String str = "LcHeQ9b2bhNW291aOgeXhBHKa1uHmNoKf/ATfX+AJbo=";
  



        // Decode data
        String decoded = new String(dec.decode(str));
        System.out.println("decoded value is \t" + decoded);
        System.out.println("original value is \t" + str);
        


        // Generate Signature
        Signature signature = Ecdsa.sign(decoded, privateKey);

        // Return the signature verification status
        System.out.println("signature: " + signature);

         // Encode into Base64 format - This value should add in QR code

        String base64 = signature.toBase64();
 
        // print encoded String
        System.out.println("Encoded String:\n" + base64);
        
    }
}