Quick study sessions to strengthen memory and retain key concepts.
How can you enforce invariants in Java classes?
Use constructor checks and controlled methods. To enforce invariants, validate conditions in the constructor and use methods to…
View Card →What common mistakes occur with encapsulation?
Exposing fields directly and using too many getters or setters. A common mistake is making fields public, which…
View Card →Why does visibility in encapsulation matter in production code?
Visibility controls access to class members. Visibility modifiers like `private`, `protected`, and `public` manage access to class members,…
View Card →What are safe change paths in domain objects?
Paths that ensure state changes are valid and consistent. Safe change paths involve using methods that guarantee any…
View Card →Why prefer business operations over direct field manipulation?
They encapsulate logic and validation, preventing invalid states. Using business operations like `processOrder()` instead of direct field manipulation…
View Card →How can immutability enhance class design?
Immutability ensures thread safety and simplifies reasoning. Immutable objects cannot be changed after creation, making them inherently thread-safe…
View Card →Why can unrestricted setters become risky in production code?
They can lead to inconsistent or invalid object states. Unrestricted setters allow any value to be set to…
View Card →What role do invariants play in class design?
Invariants ensure the class state remains valid. An invariant is a condition that must always hold true for…
View Card →How do meaningful update methods improve code?
They make updates clearer and ensure data integrity. Instead of directly changing fields, meaningful update methods encapsulate the…
View Card →Why is encapsulation crucial in Java?
Encapsulation protects object integrity by controlling access to its data. Encapsulation involves bundling data with the methods that…
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