This is a Java-based application that simulates a central banking system. It allows users to manage their portfolios, exchange currencies, transfer money, buy stocks, and upgrade to premium services.
The application allows users to manage their portfolios. Each user is identified by their email. The listPortfolio(String email) method is used to list all the stocks and accounts associated with a user.
Users can exchange one currency for another. The exchange rates are determined by the system. The exchange(String email, String currency1, String currency2, float amount) method is used to perform a currency exchange for a user.
Users can transfer money to other users within the system. The transfer is instant and free of charge. The moneyTransfer(String email1, String email2, String currency, float amount) method is used to transfer money from one user to another.
Users can buy stocks from various companies. The stock prices are updated regularly. The buyStocks(String email, String companyName, float amount) method is used to buy stocks for a user. The recommendStocks() method is used to recommend stocks to buy based on the Simple Moving Average (SMA) of the stock prices.
Users can upgrade to premium services for additional benefits. The buyPremium(String email) method is used to upgrade a user to premium services.
To use the commands, you need to create an instance of the CentralApp class and call the respective methods. Here are some examples:
CentralApp app = new CentralApp();
// To list a user's portfolio
app.listPortfolio("user@example.com");
// To perform a currency exchange for a user
app.exchange("user@example.com", "USD", "EUR", 100);
// To transfer money from one user to another
app.moneyTransfer("user1@example.com", "user2@example.com", "USD", 100);
// To buy stocks for a user
app.buyStocks("user@example.com", "Company Name", 100);
// To upgrade a user to premium services
app.buyPremium("user@example.com");