GofPattern
SiteMap
Design Patterns Course
Behavioral Patterns
Creational Patterns
Structural Patterns
Designing Software
«Prev
Next»
Design Patterns
Defining Patterns
Design Challenges
Pattern Concept
Design Pattern Components
Big-O Notation
Design Pattern Benefits
Three Types Design Patterns
Three Categories Patterns
Design Pattern Scope
Traffic Signals Project
Patterns Conclusion
Singleton Patterns
Design Pattern Elements
Intent Motivation
Pattern Applicability
Singleton Pattern Structure
Singleton Structure
Singleton Pattern-Quiz
Participants Collaborations
Consequences Effects
Class Implementation
Real World Examples
Substitute Patterns
Extension Variation Pattern
Course Project
Perfect Singleton
Pattern Conclusion
Creational Patterns
Creational Design Pattern
Creational Pattern Uses
Common Creational Patterns
Factory Pattern
Factory Method-Exercise
Factory Method Structure
Factory Method Consequences
factory Pattern Summary
Structural Patterns
Structural Pattern Example
Patterns Help Programmers
Common Structural Patterns
Flyweight Pattern
Flyweight Consequences
Flyweight Suitability
Behavioral Patterns
Define Behavioral Patterns
Mediator Pattern Applicability
Observer Pattern Tradeoffs
Designing Software
How to Choose Pattern
How To Apply Pattern
Lessons Learned
Combine Design Patterns
Design Pattern Limitations
Traffic flow System
Course Conclusion
Observer Class | Design Pattern - Exercise
Flexibility
Objective:
Make the VehicleQueue an Observer of the Time class.
Make the
VehicleQueue
an Observer of the
Time
class. Every five seconds the vehicle queue should attempt to dequeue a vehicle but if and only if the light is green. Consider whether you need to make any changes to the standard Observer pattern to make thiswork. In the text area below, type in or paste your answer and click the
Submit
button.
