// … (import statements, variable declarations)
// Get payment details from the user input
String cardNumber = …
String expiryDate = …
String cvv = …
// Tokenize the payment details (using the chosen gateway’s SDK)
String paymentToken = PaymentGateway.tokenize(cardNumber, expiryDate, cvv);
// Make the payment request to the server
PaymentRequest request = new PaymentRequest(paymentToken, amount, currency);
server.makePayment(request);
// Handle the payment response (success or error)
if (response.isSuccess()) {
// Display a success message to the user
} else {
// Display an error message to the user
}