Main function for Bitcoins coursera course

TxMain.java

import java.security.InvalidKeyException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.MessageDigest;
import java.security.Signature;
import java.security.SignatureException;


public class TxMain {
	public static void main(String[] args) 
			throws NoSuchAlgorithmException, InvalidKeyException, SignatureException 
	{		
		// This generates keypairs
		KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
		// This hashes stuff
		MessageDigest md = MessageDigest.getInstance("SHA-512");
		// This creates signatures
		Signature sig = Signature.getInstance("SHA256withRSA");
		
		// Scroodge generates a key pair
		keyGen.initialize(512); 
		KeyPair scroodge  = keyGen.generateKeyPair();
		
		// Creates genesis transaction
		Transaction genesis = new Transaction();
		genesis.addOutput(100, scroodge.getPublic());
		
		//Hashes it
		genesis.setHash(md.digest(genesis.getRawTx()));
		
		// Adds it to the pool
		UTXOPool pool = new UTXOPool();
		UTXO utxo = new UTXO(genesis.getHash(), 0);
		pool.addUTXO(utxo, genesis.getOutput(0));

		// Goofy creates his pair
		keyGen.initialize(512);
		KeyPair goofy    = keyGen.generateKeyPair();
		
		//Scroodge makes a transaction to Goofy
		Transaction send = new Transaction();
		send.addInput(genesis.getHash(), 0);
		send.addOutput(50, goofy.getPublic());
		send.addOutput(50, scroodge.getPublic());
		
		// Signs the input with his private key
		sig.initSign(scroodge.getPrivate());
		sig.update(send.getRawDataToSign(0));
		send.addSignature(sig.sign(), 0);
		
		// Hashes 
		send.setHash(md.digest(send.getRawTx()));
		
		TxHandler handler = new TxHandler(pool);
		handler.isValidTx(send);
    }
}

KKostya, is it possible that you can share the TxHanlder as well? Much appreciated.