OOP Encapsulation

Master encapsulation and information hiding to create robust, maintainable object-oriented systems. This skill focuses on controlling access to object internals and exposing well-defined interfaces.

Understanding Encapsulation

Encapsulation is the bundling of data and methods that operate on that data within a single unit, while restricting direct access to some of the object's components. This principle protects object integrity and reduces coupling.

Java Encapsulation

// Strong encapsulation with validation
public class BankAccount {
    private String accountNumber;
    private BigDecimal balance;
    private final List<Transaction> transactions;