What are some examples of encapsulation in Java?

What are some examples of encapsulation in Java?

Encapsulation in Java is the bundling of data and methods that operate on that data within a single unit, usually a class. For example, consider a class BankAccount that has private fields for account balance and account number, and public methods to deposit and withdraw money.

Can you show me the code for that BankAccount class?

Sure! Here's a simple example:

public class BankAccount {
    private double balance;
    private String accountNumber;

    public BankAccount(String accountNumber) {
        this.accountNumber = accountNumber;
        this.balance = 0.0;
    }

    public void deposit(double amount) {
        if (amount > 0) {
            balance += amount;
        }
    }

    public void withdraw(double amount) {
        if (amount > 0 && amount <= balance) {
            balance -= amount;
        }
    }

    public double getBalance() {
        return balance;
    }
}

What are the benefits of using encapsulation?

Encapsulation helps in data hiding, which protects the internal state of an object from unintended interference. It also enhances code maintainability and flexibility, allowing changes to be made to the internal implementation without affecting external code.