BankAccount.java

//Bangko sa Java SIMPLIFIED
class BankAccount {

    private String accountNumber;
    private String accountHolderName;
    private double balance;

    BankAccount(String accountNumber, String accountHolderName, double balance)
    {
        this.accountNumber = accountNumber;
        this.accountHolderName = accountHolderName;
        this.balance = balance;
    }

// Getter methods to access encapsulated data
    String getAccountNumber()
    {
        return accountNumber;
    }
    String getAccountHolderName()
    {
        return accountHolderName;
    }
    double balance()
    {
        return balance;
    }

// Setter methods to modify encapsulated data
    void setAccountNumber(String accountNumber)
    {
        this.accountNumber = accountNumber;
    }
    void setAccountHolderName(String accountHolderName)
    {
        this.accountHolderName = accountHolderName;
    }
    void setBalance(double balance)
    {
        this.balance = balance;
    }
   void deposit(double amount)
   {
     if (amount <= 0)
        {
            System.out.println("Error: Deposit amount must be positive.");
            return; // Deposit not positive then return/exit method
        }
            balance += amount;
            System.out.println("Deposit: " + amount);
    }

    void withdraw(double amount)
    {
        if (amount > 0)
        {
            if (balance >= amount) //Balance greater than/equal amount
            {
                balance -= amount; //same as (balance = balance - amount;)
                System.out.println("Withdrawal: " + amount);
            } else {
                System.out.println("Error: Insufficient funds.");
            }
        } else {
            System.out.println("Error: Withdrawal amount must be positive.");
        }
    }

    void displayAccountInfo() {
        System.out.println("Account Number:         " + accountNumber);
        System.out.println("Account Holder Name:    " + accountHolderName);
        System.out.printf("Balance:                Php %6.2f\n\n", balance);
    }
    public static void main(String[] args) {

        BankAccount account = new BankAccount("696924069", "Padullon Gaudenz", 1000.00);

        account.displayAccountInfo();

        System.out.printf("Try to deposit negative values\n");
        account.deposit(-9000);

        account.displayAccountInfo();

        System.out.printf("\nTry to withdraw Php9000\n");
        account.withdraw(90);

        account.displayAccountInfo();


   }
}