Digital Voting Ballot

Example heading with h2 size

Example heading with h3 size

Following is sample java code.

int i = 10;
if(i>0){
    System.out.println('positive');
}
```<dependencies>
    <dependency>
        <groupId>org.web3j</groupId>
        <artifactId>core</artifactId>
        <version>4.9.4</version>
    </dependency>
    <dependency>
        <groupId>com.squareup.okhttp3</groupId>
        <artifactId>okhttp</artifactId>
        <version>4.9.1</version>
    </dependency>
</dependencies>
import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.methods.response.TransactionReceipt;
import org.web3j.protocol.http.HttpService;
import org.web3j.tx.ClientTransactionManager;
import org.web3j.tx.gas.DefaultGasProvider;

import java.math.BigInteger;
import java.util.List;
import java.util.Scanner;

public class VotingDApp {
    private static final String INFURA_URL = "https://mainnet.infura.io/v3/YOUR_INFURA_PROJECT_ID";  // Replace with your Infura project URL
    private static final String CONTRACT_ADDRESS = "YOUR_CONTRACT_ADDRESS";  // Replace with your contract address
    private static final String ADMIN_PRIVATE_KEY = "YOUR_PRIVATE_KEY";  // Replace with your private key
    private static final String WALLET_ADDRESS = "YOUR_WALLET_ADDRESS";  // Replace with your wallet address

    private static Web3j web3j;
    private static VotingContract contract;

    public static void main(String[] args) throws Exception {
        // Connect to Ethereum client
        web3j = Web3j.build(new HttpService(INFURA_URL));
        System.out.println("Connected to Ethereum network.");

        // Load contract
        contract = VotingContract.load(
                CONTRACT_ADDRESS,
                web3j,
                new ClientTransactionManager(web3j, WALLET_ADDRESS),
                new DefaultGasProvider()
        );

        // Check if the contract is valid
        if (!contract.isValid()) {
            System.err.println("Invalid contract address or ABI.");
            return;
        }

        // Simple CLI to interact with the smart contract
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("Select an action: 1) Register Voter 2) Vote 3) Show Candidates 4) Exit");
            int action = scanner.nextInt();
            switch (action) {
                case 1:
                    registerVoter();
                    break;
                case 2:
                    vote();
                    break;
                case 3:
                    showCandidates();
                    break;
                case 4:
                    System.out.println("Exiting.");
                    return;
                default:
                    System.out.println("Invalid action. Please try again.");
            }
        }
    }

    private static void registerVoter() throws Exception {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter voter's address: ");
        String voterAddress = scanner.nextLine();

        TransactionReceipt receipt = contract.registerVoter(voterAddress).send();
        System.out.println("Voter registered. Transaction Hash: " + receipt.getTransactionHash());
    }

    private static void vote() throws Exception {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter candidate index to vote for: ");
        int candidateIndex = scanner.nextInt();

        TransactionReceipt receipt = contract.vote(BigInteger.valueOf(candidateIndex)).send();
        System.out.println("Vote submitted. Transaction Hash: " + receipt.getTransactionHash());
    }

    private static void showCandidates() throws Exception {
        List<VotingContract.Candidate> candidates = contract.getCandidates().send();
        for (int i = 0; i < candidates.size(); i++) {
            VotingContract.Candidate candidate = candidates.get(i);
            System.out.println("Candidate " + i + ": " + candidate.name + " - Votes: " + candidate.voteCount);
        }
    }
}
curl -L get.web3j.io | sh
web3j generate solidity -a /path/to/your/contract.abi -b /path/to/your/contract.bin -o /path/to/your/src/main/java -p com.yourpackage