CSE 362M Lab #3 CSE 362 LAB 3 INTRODUCTION The video subsystem used with Labs 0, 1, and 2 (implemented in vga.vhd) uses a “simple dual-port RAM,” i.e., a Xilinx block RAM dual-port memory with one “write” port and one “read” port, to implement the video framestore. The port map for the simple dual- port […]
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COMP2511 Creational Pattern: Singleton Pattern Prepared by Dr. Ashesh Mahidadia Creational Patterns Creational patterns provide various object creation mechanisms, which increase flexibility and reuse of existing code. v Factory Method o provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created. v Abstract
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COMP2511 Test Design “Testing shows the presence, not the absence of bugs.” —Edsger W. Dijkstra Software Testing: Test-Driven Development (TDD) v Every iteration in the software development process must be preceded with a plan to properly verify (test) that the developed software meets the requirements (i.e., post conditions). v A software developer must not create
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OOP_inJava_19T3 COMP2511 Object Oriented Programming (OOP) in Java Prepared by Dr. Ashesh Mahidadia Java is Platform Independent Windows JRE Windows JRE Solaris JRE © Aarthi Natarajan, 2018 The Java Platform Object Oriented Distributed Simple Platform- Independent Multi-threaded Secure JAVA Java Code (.java) Java Byte Code (.class) Java compiler Memory Management © Aarthi Natarajan, 2018
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ObserverPattern COMP2511 Observer Pattern Prepared by Dr. Ashesh Mahidadia Observer Pattern These lecture notes use material from the wikipedia page at: https://en.wikipedia.org/wiki/Observer_pattern and the reference book “Head First Design Patterns”. 2COMP2511: Observer Pattern Observer Pattern • The Observer Pattern is used to implement distributed event handling systems, in “event driven” programming. • In the observer
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COMP2511 Iterator Pattern Prepared by Dr. Ashesh Mahidadia Iterator Pattern: Intent and Motivation v The intent of the Iterator design pattern is to: “Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation.” [GoF] v Exposing representation details of an aggregate breaks its encapsulation. v Problem to address:
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COMP2511 Creational Pattern: Builder Pattern Prepared by Dr. Ashesh Mahidadia Builder Pattern Intent: Builder is a creational design pattern that lets you construct complex objects step by step. The pattern allows you to produce different types and representations of an object using the same construction code. Problem: v Imagine a complex object that requires laborious,
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COMP2511 Generics and Collections in Java Prepared by Dr. Ashesh Mahidadia Generics in Java (Part 1) 2COMP2511: Generics and Collections in Java Generics in Java Generics enable types (classes and interfaces) to be parameters when defining: • classes, • interfaces and • methods. Benefits v Removes casting and offers stronger type checks at compile time.
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OOP_inJava_19T3 COMP2511 Object Oriented Programming (OOP) in Java Prepared by Dr. Ashesh Mahidadia OOP in Java v Object Oriented Programming (OOP) v Inheritance in OOP v Introduction to Classes and Objects v Subclasses and Inheritance v Abstract Classes v Single Inheritance versus Multiple Inheritance v Interfaces v Method Forwarding (Has-a relationship) v Method Overriding (Polymorphism)
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COMP2511 Exceptions in Java Prepared by Dr. Ashesh Mahidadia Exceptions in Java v An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program’s instructions. v When error occurs, an exception object is created and given to the runtime system, this is called throwing an
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