Overloading a constructor If a constructor is overloaded, then an if statement in the client is needed when creating the object. We have always declared.

Slides:



Advertisements
Similar presentations
Classes & Objects INTRODUCTION : This chapter introduces classes ; explains data hiding, abstraction & encapsulation and shows how a class implements these.
Advertisements

Programmer-defined classes Part 2. Topics Returning objects from methods The this keyword Overloading methods Class methods Packaging classes Javadoc.
Procedural programming in Java
What have we learned so far… Preprocessor directives Introduction to C++ Variable Declaration Display Messages on Screen Get Information from User Performed.
Coding Standards for Java An Introduction. Why Coding Standards are Important? Coding Standards lead to greater consistency within your code and the code.
Animation Mrs. C. Furman. Animation  We can animate our crab by switching the image between two pictures.  crab.png and crab2.png.
JavaScript Part for Repetition Statement for statement Cpecifies each of the items needed for counter-controlled repetition with a control variable.
Sizes of simple data types sizeof(char) = 1 size(short) = 2 sizeof(int) = 4 size(long) = 8 sizeof(char) = 1 size(short) = 2 sizeof(int) = 2 size(long)
Lecture 3: Topics If-then-else Operator precedence While loops Static methods Recursion.
Python November 18, Unit 7. So Far We can get user input We can create variables We can convert values from one type to another using functions We can.
More C++ Bryce Boe 2013/07/18 CS24, Summer 2013 C.
JavaServer Pages Syntax Harry Richard Erwin, PhD CSE301/CIT304.
Binary Numbers. Why Binary? Maximal distinction among values  minimal corruption from noise Imagine taking the same physical attribute of a circuit,
Subroutines in Computer Programming Svetlin Nakov Telerik Corporation
Classes and Objects. Topics The Class Definition Declaring Instance Member Variables Writing Instance Member Methods Creating Objects Sending Messages.
© The McGraw-Hill Companies, 2006 Chapter 4 Implementing methods.
CH2 – Using Data. Constant Something which cannot be changed Data Type Format and size of a data item Intrinsic Data Types Pg. 47 – Table 2-1 Basic ones.
Passing Other Objects Strings are called immutable which means that once a String object stores a value, it never changes –recall when we passed a message.
Method Overriding Remember inheritance: when a child class inherits methods, variables, etc from a parent class. Example: public class Dictionary extends.
3 - Variables Lingma Acheson Department of Computer and Information Science, IUPUI CSCI N331 VB.NET Programming.
Chapter 6 Sub Procedures
ECE122 Feb. 22, Any question on Vehicle sample code?
Lecture 2: Introduction to C Programming. OBJECTIVES In this lecture you will learn:  To use simple input and output statements.  The fundamental data.
With Python.  One of the most useful abilities of programming is the ability to manipulate files.  Python’s operations for file management are relatively.
Classes In C++ 1. What is a class Can make a new type in C++ by declaring a class. A class is an expanded concept of a data structure: instead of holding.
More C++ Features True object initialisation
CS 376b Introduction to Computer Vision 01 / 23 / 2008 Instructor: Michael Eckmann.
Data Representation Hexadecimal  Although computers work in binary it is sometimes inconvenient for humans to read everything in Binary. For example in.
Programming with Visual C++: Concepts and Projects Chapter 3A: Integral Data (Concepts)
Conditional Loops CSIS 1595: Fundamentals of Programming and Problem Solving 1.
Unit 2 Test: Tues 11/3. ASCII / Unicode –Each letter, symbol, etc has a # value –See ascii table (in folder) –To convert a char into its ascii value,
ITEC 109 Lecture 7 Operations. Review Variables / Methods Functions Assignments –Purpose? –What provides the data? –What stores the data? –What type of.
Methods Methods are how we implement actions – actions that objects can do, or actions that can be done to objects. In Alice, we have methods such as move,
Composition When one class contains an instance variable whose type is another class, this is called composition. Instead of inheritance, which is based.
Using variable Variables are used to store values.
Fall 2015CISC/CMPE320 - Prof. McLeod1 CISC/CMPE320 Today: –Review declaration, implementation, simple class structure. –Add an exception class and show.
Georgia Institute of Technology More on Creating Classes part 1 Barb Ericson Georgia Institute of Technology Oct 2005.
Struct s (7.4) Used as data aggregates for an entity can be different types of data e.g. for student id, name, GPA, address,... Similar to classes, but.
Compare and Order Integers SWBAT compare and order integers.
Array Size Arrays use static allocation of space. That is, when the array is created, we must specify the size of the array, e.g., int[] grades = new int[100];
Non-Static Classes What is the Object of this lecture?
Constructors A constructor is a method that has the same name as the class itself It is automatically called when an object is instantiated (in other words,
Copyright © Curt Hill Simple I/O Input and Output using the System and Scanner Objects.
Class Everything in Java is in a class. The class has a constructor that creates the object. If you do not supply a constructor Java will create a default.
COP 2220 Computer Science I Topics –Breaking Problems Down –Functions –User-defined Functions –Calling Functions –Variable Scope Lecture 4.
Today… Preparation for doing Assignment 1. Invoking methods overview. Conditionals and Loops. Winter 2016CMPE212 - Prof. McLeod1.
Testing It is much better to have a plan when testing your programs than it is to just randomly try values in a haphazard fashion. Testing Strategies:
Georgia Institute of Technology More on Creating Classes Barb Ericson Georgia Institute of Technology June 2006.
Java 5 Class Anatomy. User Defined Classes To this point we’ve been using classes that have been defined in the Java standard class library. Creating.
4. Java language basics: Function
Review What is an object? What is a class?
Agenda Warmup Finish 2.4 Assignments
Agenda Warmup AP Exam Review: Litvin A2
5. Function (2) and Exercises
Case Statements and Functions
Object Oriented Systems Lecture 03 Method
Agenda Warmup Lesson 2.5 (Ascii, Method Overloading)
Method Mark and Lyubo.
Contents Introduction to Constructor Characteristics of Constructor
String Methods: length substring
More on Classes and Objects
Class Examples.
CS2011 Introduction to Programming I Loop Statements (II)
CISC124 Labs start this week in JEFF 155.
Agenda Warmup Lesson 2.6 (Constructors, Encapsulation)
Javascript Chapter 19 and 20 5/3/2019.
Agenda Warmup Lesson 2.2 (parameters, etc)
Chapter 9 Introduction To Classes
Classes and Objects CGS3416 Spring 2019.
Agenda Warmup Lesson 2.8 (Overloading constructors, etc)
Presentation transcript:

Overloading a constructor If a constructor is overloaded, then an if statement in the client is needed when creating the object. We have always declared objects and given them values on the same line. Sometimes, you must do these 2 things separately. Demo: ConstructorOverloadClass & ConstructorOverloadClient

Using a return statement to break a loop Although we learned previously that you usually want to avoid putting a return statement inside a loop, (as well as inside an if statement), sometimes it is necessary / more efficient to do so. When you do this, the return will cause a break from the loop. Demo: ReturnInsideLoopDemo

Add the following methods to DavosClass, and then make necessary additions to the client: An overloaded constructor – it should receive no parameters, and assign the number 42 to the age variable. An overloaded abs( ) – receives two numbers as parameters, only returns the absolute value of the smaller number. same( ) – receives 2 words as parameters, returns true if they are the same word An overloaded same( ) – receives one word as a parameter, returns true if the word is “bird” convertToDecimal( ) – receives a String parameter (which will actually be an 8-bit binary #), converts this number to decimal, and returns it (as an int). displayGreeting( ) – a private method that just displays “oh hey.” letterGame( ) – receives no parameters, calls the private method displayGreeting( ), creates a random lowercase letter (hint: easier than it seems), then gives the user 10 chances to guess the letter. Returns nothing.