Encapsulation
4 Topics
1
Encapsulation Basics
Examine data hiding, private class state, public interface access boundaries, and encapsulation vs. abstraction.
Focuses on private state protection, bundling data with methods, and differences between encapsulation and abstraction.
2
Getters and Setters
Master accessor and mutator design, read-only/write-only properties, and defensive copying of mutable references.
Critically important: defensive copying inside getters and constructors to prevent reference leaks of mutable objects.
3
POJO and Java Beans
Dissect POJO specifications, Java Bean conventions, and modern boilerplate reductions via Java Records.
Evaluates difference between POJO and Java Bean conventions, and Java Records (immutable data carriers, compact constructors, and compiler-generated code).
4
Benefits of Encapsulation
Analyze encapsulation benefits, including class implementation flexibilities, validation controls, and code maintainability.
Focuses on refactoring scenarios, demonstrating how encapsulation allows internal state representation changes without breaking client code.