import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class DBUtil {
private static Connection connection;
public static Connection getConnection() {
if (connection == null) {
try {
String url = "jdbc:mysql://localhost:3306/mydatabase";
String username = "username";
String password = "password";
connection = DriverManager.getConnection(url, username, password);
} catch (SQLException e) {
e.printStackTrace();
}
}
return connection;
}
}
import javax.transaction.*;
public class TransactionExample {
private UserTransaction transaction;
public TransactionExample(UserTransaction transaction) {
this.transaction = transaction;
}
public void transferFunds(String fromAccount, String toAccount, double amount) {
try {
transaction.begin();
// ...
transaction.commit();
e.printStackTrace();
try {
transaction.rollback();
} catch (SystemException ex) {
ex.printStackTrace();
}
}
}
}
import javax.transaction.*;
public class Main {
public static void main(String[] args) {
UserTransaction transaction = com.arjuna.ats.jta.UserTransaction.userTransaction();
TransactionExample example = new TransactionExample(transaction);
example.transferFunds("account1", "account2", 1000.0);
}
}
