COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 3-3: OOD2 Constructors, this Giulia Alberini, Fall 2020 FROM LAST VIDEO Packages Fields Modifiers MODIFIERS REVIEW – OUTER CLASS Dog.java Farm.java package animals; public class Dog { ⋮ } package buildings; import animals.Dog; public class Farm { Dog d; ⋮ } Does the compiler allow […]
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 8-2 : OOD9 Comparable Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? Java interface Comparable COMPARABLE JAVA Comparable INTERFACE The Java Comparable interface is used to define an ordering on objects of user-defined class. Why would you want that? Well,
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 4-1: OOD4 UML Diagrams and Inheritance Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? OOD4 UML diagrams Inheritance UML DIAGRAMS UML DIAGRAMS Unified Modeling Language (UML) provides a set of standard diagrams for graphically depicting object-oriented systems. Class name goes here Attributes/Fields
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 3-1: Errors, exceptions, and try catch blocks Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? Errors and Exceptions Try/catch blocks KIND OF ERRORS Stylistic Errors The functionality of your code is not affected. Your code is hard to read.
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 4-4 : OOD7 Polymorphism Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? OOD7 instanceof Intro to Polymorphism Abstract Classes and Methods A LITTLE ABOUT instanceof The instanceof operator is used to test whether an object is an instance of the
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 3-2: OOD1 Packages, Fields, and Modifiers Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? OOD1 Packages Fields Modifiers WARNING! This is a terminology-heavy lecture! Do not hesitate to stop the video and rewind. PACKAGES PACKAGES A package
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 1-1: Java syntax Part 1 Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? Java programs General Java syntax Variable declaration Operators JAVA RESOURCES Check out the free online Java book “How to think like a computer scientist: Think
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 4-2 : OOD5 the class Object Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? OOD5 The Object class Object CLASS THE Object CLASS Object is the only class in java without a superclass. All other classes have one and only one
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 7-2 : Queues Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Queues ADT (ABSTRACT DATA TYPE) List add(i, e), remove(i), get(i), set(i), ….. Stack push(e) , pop(), .. Queue enqueue(e), dequeue() QUEUE dequeue (remove
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 5-1: Arraylist Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? Arraylist ARRAY LISTS ARRAYS IN JAVA Arrays whose elements have a primitive type int[] myInts = new int[15]; myInts[3] = -732; Arrays whose elements have a reference type Shape[] myShapes
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