[Projeto] [Projeto] Banco

import java.util.Random;
import java.util.Scanner;
public class Main
{
    public static void main(String[] args) {
        Scanner scan = new Scanner (System.in);
        String name = "Jacqueline Oliveira";
        String account =  "Corrente";
        Double amount = 2500.00;
        int userOption = 0;
        Double transferResult;
        
        while (userOption !=4){
            showMessage(name, account, amount);
            userOption = scan.nextInt();  
            switch (userOption){
                case 1:
                    showMessage(name, account, amount);
                    break;
                case 2: 
                    System.out.println("Digite o valor de deposito:");
                    Double receivedCash = scan.nextDouble();
                    transferResult = receiveCash (receivedCash, amount);
                    if (transferResult != -1.0){
                        amount = transferResult;
                    }
                    break;
                case 3: 
                    System.out.println("Digite o valor de transferencia:");
                    Double cashSent = scan.nextDouble();
                    transferResult =  sendCash (cashSent, amount);
                    if (transferResult != -1.0){
                        amount = transferResult;
                    }
                    break;
                case 4: 
                    System.out.println("Programa Encerrado!");
                    break;
                default:
                    System.out.println("Opção inválida. Tente novamente.");
                    break;
            }
        }
        scan.close();
    }
    
    public static void showMessage (String name, String account, Double amount){
        System.out.println("""
                         ************************
                         Dados do cliente
                         Nome: %s
                         Tipo conta: %s
                         Saldo Atual: R$ %.2f
                         ************************
                         Operações

                         1- Consultar saldos
                         2- Receber valor
                         3- Transferir valor
                         4- Sair
                        
                         Digite a opção desejada:
                         """.formatted(name, account, amount));
    }
        public static Double receiveCash (Double receivedCash, Double amount){
            if (receivedCash <= 0){
                System.out.println("Nao é possivel enviar valor zero ou negativo!");
                return -1.0;
            }
            
            amount += receivedCash;
            System.out.println("""
                         Valor Recebido: R$ %.2f
                         Novo Saldo: R$ %.2f
                         """.formatted(receivedCash, amount ));
            return amount;
    }
    public static Double sendCash (Double cashSent, Double amount){
            if (cashSent <= 0){
                    System.out.println("O valor da transferência precisa ser maior que zero!");
                    return -1.0;
            }
            Double result = amount - cashSent;
            if (result < 0){
                System.out.println("Valor a ser transferido ultrapassa saldo atual!");
                return -1.0;
            }
            System.out.println("""
                         Valor Transferido: %.2f
                         Novo Saldo: %.2f
                         """.formatted(cashSent, result));
            return result;
    }
}