CITS2210 Object-Oriented Programming. Topic 10. Java: Nested and Inner Classes
|
|
- Octavia Louisa Dickerson
- 6 years ago
- Views:
Transcription
1 CITS2210 Object-Oriented Programming Topic 10 Java: Nested and Inner Classes Summary: Nested and inner classes allow classes do be defined within other classes, and even within bodies of methods. They enable certain styles of programming that are awkward otherwise. 1
2 What are nested and inner classes? A nested class is a class defined inside another class. public class OuterClass { class NestedClass { Nested class declarations can appear in classes and interfaces along with the more standard variable declarations and method declarations. Like other declarations, they can have modifiers like public, static, etc. A non-static nested class is called an inner class. You can always write separate classes instead of using nested classes, but they are still useful for the following reasons. They allow helper classes to be logically grouped with a main class. They allow improved encapsulation since nested classes can access private variables, and can be private themselves. They allow code to be better organized, with related code appearing in one place. 2
3 Static nested classes Static nested classes are attached to the outer class. They can only access static variables and methods from the outerclass directly. As such, static nested classes can usually be easily moved to become top-level classes the nesting is only used for organization. Static nested classes are can be accessed via the outer class, just like static methods and class variables (assuming that they are not private). public class Outer { public static class StaticNested { Outer.StaticNested nested = new Outer.StaticNested(); 3
4 Inner classes Inner classes are attached to a particular instance of the outer class. So, each instance of the inner class is also attached to this instance of the outer class. To create instances of an inner class you need an instance of the outer class so that you can use new with the inner class in that instance. Instances of inner classes can directly access all the methods and instance variables of the enclosing class for the instance they are attached to. public class Outer { private int instancevar; public class Inner { public int getouter() { return instancevar; Outer outer = new outer(); Outer.Inner inner = outer.new Inner(); int i = inner.getouter; 4
5 Extended example of an inner class public class DataStructure { private final static int SIZE = 15; private int[] arrayofints = new int[size]; public DataStructure() { for (int i = 0; i < SIZE; i++) { arrayofints[i] = i; //fill the array public void printeven() { //print out values of even indices of the array private class InnerEvenIterator { private int next = 0; // Begin at the start of the array. public boolean hasnext() { return (next <= SIZE - 1); public int getnext() { int retvalue = arrayofints[next]; next += 2; return retvalue; public static void main(string s[]) { DataStructure ds = new DataStructure(); InnerEvenIterator iterator = ds.new InnerEvenIterator(); while (iterator.hasnext()) { System.out.println(iterator.getNext() + " "); 5
6 Local and anonymous classes Sometimes an inner class is created specifically to be used in one particular place. In these cases, it makes sense to define the class where it is used rather than separately as a part of the outer class. A local class is an inner class that is defined a method body. An anonymous class is a class that is defined at the exact point where it is used, i.e., where an instance of the class is created. Local classes may be used many times within the the method where they are defined, while anonymous classes are only used once. interface IntRunnable { int run(); public class AnonEx { public static int callrun(intrunnable runnable) { runnable.run(); public static void main(string argv[]) { callrun(new IntRunnable() { // Anonymous class public int run() { return 3 * 5; ); // Close class then call to callrun 6
7 What use are anonymous classes? Anonymous classes turn out to be particularly useful when creating complex objects from a collection of simpler ones, each with their own methods. It is also often useful for glue code. These styles of programming largely borrow from functional programming, and are generally referred to as higher order. Increasingly this style is influencing object-oriented programming. C# in particular has been highly influenced. 7
Topic 6: Inner Classes
Topic 6: Inner Classes What's an inner class? A class defined inside another class Three kinds: inner classes static nested classes anonymous classes this lecture: Java mechanisms later: motivation & typical
More informationC30b: Inner Class, Anonymous Class, and Lambda Expression
CISC 3115 TY3 C30b: Inner Class, Anonymous Class, and Lambda Expression Hui Chen Department of Computer & Information Science CUNY Brooklyn College 12/6/2018 CUNY Brooklyn College 1 Outline Discussed Concept
More informationAnother IS-A Relationship
Another IS-A Relationship Not all classes share a vertical relationship. Instead, some are supposed to perform the specific methods without a vertical relationship. Consider the class Bird inherited from
More informationPackages Inner Classes
Packages Inner Classes Sisoft Technologies Pvt Ltd SRC E7, Shipra Riviera Bazar, Gyan Khand-3, Indirapuram, Ghaziabad Website: www.sisoft.in Email:info@sisoft.in Phone: +91-9999-283-283 Learning - Topics
More informationenum Types 1 1 The keyword enum is a shorthand for enumeration. Zheng-Liang Lu Java Programming 267 / 287
enum Types 1 An enum type is an reference type limited to an explicit set of values. An order among these values is defined by their order of declaration. There exists a correspondence with string names
More informationTiming for Interfaces and Abstract Classes
Timing for Interfaces and Abstract Classes Consider using abstract classes if you want to: share code among several closely related classes declare non-static or non-final fields Consider using interfaces
More informationWrapper Classes double pi = new Double(3.14); 3 double pi = new Double("3.14"); 4... Zheng-Liang Lu Java Programming 290 / 321
Wrapper Classes To treat values as objects, Java supplies standard wrapper classes for each primitive type. For example, you can construct a wrapper object from a primitive value or from a string representation
More information*An nested class is a class that is defined inside another class.
An nested class is a class that is defined inside another class. In Java, just like methods, variables of a class too can have another class as its member. Writing a class within another is allowed in
More informationInterfaces. An interface forms a contract between the object and the outside world.
Interfaces An interface forms a contract between the object and the outside world. For example, the buttons on the television set are the interface between you and the electrical wiring on the other side
More informationInterfaces (1/2) An interface forms a contract between the object and the outside world.
Interfaces (1/2) An interface forms a contract between the object and the outside world. For example, the buttons on remote controls for some machine. As you can see, an interface is a reference type,
More information2IP15 Programming Methods
Lecture 5: Iteration Abstraction 2IP15 Programming Methods From Small to Large Programs Tom Verhoeff Eindhoven University of Technology Department of Mathematics & Computer Science Software Engineering
More informationSwing: Building GUIs in Java
Swing: Building GUIs in Java ENGI 5895: Software Design Andrew Vardy Faculty of Engineering & Applied Science Memorial University of Newfoundland February 13, 2017 Outline 1 Introduction 2 Aside: Inner
More informationNested Classes in Java. Slides by: Alon Mishne Edited by: Eran Gilad, Eyal Moscovici April 2013
Nested Classes in Java Slides by: Alon Mishne Edited by: Eran Gilad, Eyal Moscovici April 2013 1 In This Tutorial Explanation of the nested class concept. Access modifiers and nested classes. The types
More informationSwing: Building GUIs in Java
Swing: Building GUIs in Java ENGI 5895: Software Design Andrew Vardy Faculty of Engineering & Applied Science Memorial University of Newfoundland February 13, 2017 Outline 1 Introduction 2 Aside: Inner
More informationCS : Data Structures Michael Schatz. Sept Lecture 5: Iterators
CS 600.226: Data Structures Michael Schatz Sept 10 2018 Lecture 5: Iterators Agenda 1. Review HW1 2. References and Linked Lists 3. Nested Classes and Iterators Assignment 1: Due Friday Sept 14 @ 10pm
More informationA final method is a method which cannot be overridden by subclasses. A class that is declared final cannot be inherited.
final A final variable is a variable which can be initialized once and cannot be changed later. The compiler makes sure that you can do it only once. A final variable is often declared with static keyword
More informationList ADT. Announcements. The List interface. Implementing the List ADT
Announcements Tutoring schedule revised Today s topic: ArrayList implementation Reading: Section 7.2 Break around 11:45am List ADT A list is defined as a finite ordered sequence of data items known as
More informationProgramming Language Concepts: Lecture 6
Programming Language Concepts: Lecture 6 Madhavan Mukund Chennai Mathematical Institute madhavan@cmi.ac.in http://www.cmi.ac.in/~madhavan/courses/pl2009 PLC 2009, Lecture 6, 04 February 2009 Private classes
More informationSubtype Polymorphism
Subtype Polymorphism For convenience, let U be a subtype of T. Liskov Substitution Principle states that T-type objects may be replaced with U-type objects without altering any of the desirable properties
More informationUser Interface Programming OOP/Java Primer. Step 4 Some Final Checkups
User Interface Programming OOP/Java Primer Step 4 Some Final Checkups Department of Information Technology Classes, Inner and Anonymous Sometimes we encounter classes within other classes. Why should we
More informationBuilder pattern. A creational pattern
Builder pattern A creational pattern Building a complex object Let s say that we have a class for pretty complex objects, with lots of internal instance variables. We could provide a lot of constructors
More informationVendor: Oracle. Exam Code: 1Z Exam Name: Java Certified Programmer. Version: Demo
Vendor: Oracle Exam Code: 1Z0-501 Exam Name: Java Certified Programmer Version: Demo QUESTION NO: 1 Which statement is true? A. An anonymous inner class may be declared as final. B. An anonymous inner
More informationExercise. Zheng-Liang Lu Java Programming 273 / 324
Exercise Zheng-Liang Lu Java Programming 273 / 324 1 public class AnimalFamilyDemo { 2 public static void main(string[] args) { 3 Dog d = new Dog(); 4 d.sleep(); 5 d.eat(); 6 d.watchdoor(); 7 8 Animal
More informationMethod Overriding. Note that you can invoke the overridden method through the use of the keyword super.
Method Overriding The subclass is allowed to change the behavior inherited from its superclass, if needed. If one defines an instance method with its method name, parameters, and its return type, all identical
More informationCS 251 Intermediate Programming More on classes
CS 251 Intermediate Programming More on classes Brooke Chenoweth University of New Mexico Spring 2018 Empty Class public class EmptyClass { Has inherited methods and fields from parent (in this case, Object)
More informationProgramming overview
Programming overview Basic Java A Java program consists of: One or more classes A class contains one or more methods A method contains program statements Each class in a separate file MyClass defined in
More informationProgramming Languages and Techniques (CIS120)
Programming Languages and Techniques (CIS120) Lecture 35 November 29, 2017 Swing II: Building GUIs Inner Classes Chapter 29 Announcements Game Project Complete Code Due: December 11 th NO LATE SUBMISSIONS
More informationMethod Overriding. Note that you can invoke the overridden method through the use of the keyword super.
Method Overriding The subclass is allowed to change the behavior inherited from its superclass, if needed. If one defines an instance method with its method name, parameters, and also return type, all
More informationChapter 4. Defining Classes I
Chapter 4 Defining Classes I Introduction Classes are the most important language feature that make object-oriented programming (OOP) possible Programming in Java consists of defining a number of classes
More informationGoal. Generic Programming and Inner classes. Minor rewrite of linear search. Obvious linear search code. Intuitive idea of generic linear search
Goal Generic Programming and Inner classes First version of linear search Input was array of int More generic version of linear search Input was array of Comparable Can we write a still more generic version
More informationDeclarations and Access Control SCJP tips
Declarations and Access Control www.techfaq360.com SCJP tips Write code that declares, constructs, and initializes arrays of any base type using any of the permitted forms both for declaration and for
More informationEvery language has its own scoping rules. For example, what is the scope of variable j in this Java program?
Lexical Binding There are two ways a variable can be used in a program: As a declaration As a "reference" or use of the variable Scheme has two kinds of variable "declarations" -- the bindings of a let-expression
More informationLinked List Nodes (reminder)
Outline linked lists reminders: nodes, implementation, invariants circular linked list doubly-linked lists iterators the Java foreach statement iterator implementation the ListIterator interface Linked
More informationExercise (Revisited)
Exercise (Revisited) Redo the cashier problem by using an infinite loop with a break statement. 1... 2 while (true) { 3 System.out.println("Enter price?"); 4 price = input.nextint(); 5 if (price
More informationNested Loops. A loop can be nested inside another loop.
Nested Loops A loop can be nested inside another loop. Nested loops consist of an outer loop and one or more inner loops. Each time the outer loop is repeated, the inner loops are reentered, and started
More informationCSSE 220. Event Based Programming. Check out EventBasedProgramming from SVN
CSSE 220 Event Based Programming Check out EventBasedProgramming from SVN Interfaces are contracts Interfaces - Review Any class that implements an interface MUST provide an implementation for all methods
More informationClasses and Objects 3/28/2017. How can multiple methods within a Java class read and write the same variable?
Peer Instruction 8 Classes and Objects How can multiple methods within a Java class read and write the same variable? A. Allow one method to reference a local variable of the other B. Declare a variable
More informationC08: Inheritance and Polymorphism
CISC 3120 C08: Inheritance and Polymorphism Hui Chen Department of Computer & Information Science CUNY Brooklyn College 2/26/2018 CUNY Brooklyn College 1 Outline Recap and issues Project progress? Practice
More informationExample: Monte Carlo Simulation 1
Example: Monte Carlo Simulation 1 Write a program which conducts a Monte Carlo simulation to estimate π. 1 See https://en.wikipedia.org/wiki/monte_carlo_method. Zheng-Liang Lu Java Programming 133 / 149
More informationReflection. Based on https://docs.oracle.com/javase/tutorial/reflect/
Reflection Based on https://docs.oracle.com/javase/tutorial/reflect/ Reflection is commonly used by programs which require the ability to examine or modify the runtime behavior of applications running
More informationArray. Prepared By - Rifat Shahriyar
Java More Details Array 2 Arrays A group of variables containing values that all have the same type Arrays are fixed length entities In Java, arrays are objects, so they are considered reference types
More informationIntroduction to Programming Using Java (98-388)
Introduction to Programming Using Java (98-388) Understand Java fundamentals Describe the use of main in a Java application Signature of main, why it is static; how to consume an instance of your own class;
More informationRepetition and Loop Statements Chapter 5
Repetition and Loop Statements Chapter 5 1 Chapter Objectives To understand why repetition is an important control structure in programming To learn about loop control variables and the three steps needed
More informationC09: Interface, and Abstract Class and Method
CISC 3120 C09: Interface, and Abstract Class and Method Hui Chen Department of Computer & Information Science CUNY Brooklyn College 2/28/2018 CUNY Brooklyn College 1 Outline Recap Inheritance and polymorphism
More informationCasting -Allows a narrowing assignment by asking the Java compiler to "trust us"
Primitives Integral types: int, short, long, char, byte Floating point types: double, float Boolean types: boolean -passed by value (copied when returned or passed as actual parameters) Arithmetic Operators:
More informationInner Classes. CMSC 433 Programming Language Technologies and Paradigms Spring Example: The Queue Class. Example: The Queue Class (cont d)
CMSC 433 Programming Language Technologies and Paradigms Spring 2007 Inner Classes & Iterators Mar. 6, 2007 Inner Classes Classes can be nested inside other classes These are called inner classes Within
More informationJava Strings Java, winter semester
Java Strings 1 String instances of java.lang.string compiler works with them almost with primitive types String constants = instances of the String class immutable!!! for changes clases StringBuffer, StringBuilder
More informationCollections and Iterators. Collections
Collections and Iterators Based on the notes from David Fernandez-Baca and Steve Kautz Based on The Java Tutorial (http://docs.oracle.com/javase/tutorial/java/) Bryn Mawr College CS206 Intro to Data Structures
More informationLoops and Files. Chapter 04 MIT 12043, Fundamentals of Programming By: S. Sabraz Nawaz
Loops and Files Chapter 04 MIT 12043, Fundamentals of Programming By: S. Sabraz Nawaz Chapter Topics o The Increment and Decrement Operators o The while Loop o Shorthand Assignment Operators o The do-while
More informationObject Oriented Software Design
Object Oriented Software Design Containers Giuseppe Lipari http://retis.sssup.it/~lipari Scuola Superiore Sant Anna Pisa October 12, 2011 G. Lipari (Scuola Superiore Sant Anna) Introduction to Java October
More informationProgramming Languages and Techniques (CIS120)
Programming Languages and Techniques (CIS120) Lecture 35 November 28, 2018 Swing II: Inner Classes and Layout Chapter 30 Announcements Game Project Complete Code Due: December 10 th NO LATE SUBMISSIONS
More informationAn Activation Record for Simple Subprograms. Activation Record for a Language with Stack-Dynamic Local Variables
Activation Records The storage (for formals, local variables, function results etc.) needed for execution of a subprogram is organized as an activation record. An Activation Record for Simple Subprograms.
More informationCSE 143 Lecture 26. Advanced collection classes. (ADTs; abstract classes; inner classes; generics; iterators) read 11.1, 9.6, ,
CSE 143 Lecture 26 Advanced collection classes (ADTs; abstract classes; inner classes; generics; iterators) read 11.1, 9.6, 15.3-15.4, 16.4-16.5 slides created by Marty Stepp, adapted by Alyssa Harding
More informationCP122 CS I. Iteration
CP122 CS I Iteration Tech News! Pix2Pix: machine learning translation of images https://affinelayer.com/pixsrv/ Tech News! Pix2Pix: machine learning translation of images https://affinelayer.com/pixsrv/
More informationChapter 4: Loops and Files
Chapter 4: Loops and Files Chapter Topics Chapter 4 discusses the following main topics: The Increment and Decrement Operators The while Loop Using the while Loop for Input Validation The do-while Loop
More informationObject-Oriented Programming in Java
CSCI/CMPE 3326 Object-Oriented Programming in Java Loop Statements Dongchul Kim Department of Computer Science University of Texas Rio Grande Valley The Increment and Decrement Operators There are numerous
More informationChapter 4: Loops and Files
Chapter 4: Loops and Files Starting Out with Java: From Control Structures through Objects Fifth Edition by Tony Gaddis Chapter Topics Chapter 4 discusses the following main topics: The Increment and Decrement
More informationpublic class TicketMachine Inner part omitted. public class ClassName Fields Constructors Methods
Main concepts to be covered Understanding class definitions Looking inside classes fields constructors methods parameters assignment statements 5.0 2 Ticket machines an external view Exploring the behavior
More informationCMSC 132: Object-Oriented Programming II
CMSC 132: Object-Oriented Programming II Java Support for OOP Department of Computer Science University of Maryland, College Park Object Oriented Programming (OOP) OO Principles Abstraction Encapsulation
More informationArrays: Higher Dimensional Arrays. CS0007: Introduction to Computer Programming
Arrays: Higher Dimensional Arrays CS0007: Introduction to Computer Programming Review If the == operator has two array variable operands, what is being compared? The reference variables held in the variables.
More informationJava Exceptions Java, winter semester
Java Exceptions 1 Exceptions errors reporting and handling an exception represents an error state of a program exception = an instance of java.lang.throwable two subclasses java.lang.error and java.lang.exception
More informationAbout this exam review
Final Exam Review About this exam review I ve prepared an outline of the material covered in class May not be totally complete! Exam may ask about things that were covered in class but not in this review
More informationWhat is an Iterator? An iterator is an abstract data type that allows us to iterate through the elements of a collection one by one
Iterators What is an Iterator? An iterator is an abstract data type that allows us to iterate through the elements of a collection one by one 9-2 2-2 What is an Iterator? An iterator is an abstract data
More informationProgramming Languages and Techniques (CIS120)
Programming Languages and Techniques (CIS120) Lecture 34 April 10, 2012 Swing III: Inner Classes and OO refactoring Announcements HW 9 due tonight at 11:59:59pm Lab today is only GUI lab (i.e. save HW
More informationComputational Expression
Computational Expression Do While Loop, For Loop, Arrays Janyl Jumadinova 26 November, 2018 Janyl Jumadinova Computational Expression 26 November, 2018 1 / 18 Review: Repetition structures while() loop
More informationControl Flow Statements
Control Flow Statements The statements inside your source files are generally executed from top to bottom, in the order that they appear. Control flow statements, however, break up the flow of execution
More informationProgramming Languages and Techniques (CIS120e)
Programming Languages and Techniques (CIS120e) Lecture 30 Nov. 22, 2010 Swing II HW10 Preview HW10 Available Wednesday; Due Friday, Dec 10 We give you code for a simple Pong game Goal: Build a GUI for
More informationExceptions, Case Study-Exception handling in C++.
PART III: Structuring of Computations- Structuring the computation, Expressions and statements, Conditional execution and iteration, Routines, Style issues: side effects and aliasing, Exceptions, Case
More informationAP Computer Science Chapter 10 Implementing and Using Classes Study Guide
AP Computer Science Chapter 10 Implementing and Using Classes Study Guide 1. A class that uses a given class X is called a client of X. 2. Private features of a class can be directly accessed only within
More informationIn Java, data type boolean is used to represent Boolean data. Each boolean constant or variable can contain one of two values: true or false.
CS101, Mock Boolean Conditions, If-Then Boolean Expressions and Conditions The physical order of a program is the order in which the statements are listed. The logical order of a program is the order in
More informationJava Certification Model Question & Answer
Java Certification Model Question & Answer - 4 Java Certification, Programming, JavaBean and Object Oriented Reference Books Sun Certified Programmer for the Java2 Platform Mock Exam S:- Which of the following
More informationENCAPSULATION. private, public, scope and visibility rules. packages and package level access.
ENCAPSULATION private, public, scope and visibility rules. packages and package level access. Q. Explain the term Encapsulation with an example? Ans: The wrapping up to data and methods into a single units
More informationProgramming by Delegation
Chapter 2 a Programming by Delegation I. Scott MacKenzie a These slides are mostly based on the course text: Java by abstraction: A client-view approach (4 th edition), H. Roumani (2015). 1 Topics What
More informationSTUDENT LESSON A12 Iterations
STUDENT LESSON A12 Iterations Java Curriculum for AP Computer Science, Student Lesson A12 1 STUDENT LESSON A12 Iterations INTRODUCTION: Solving problems on a computer very often requires a repetition of
More informationRepe$$on CSC 121 Spring 2017 Howard Rosenthal
Repe$$on CSC 121 Spring 2017 Howard Rosenthal Lesson Goals Learn the following three repetition structures in Java, their syntax, their similarities and differences, and how to avoid common errors when
More informationJump Statements. The keyword break and continue are often used in repetition structures to provide additional controls.
Jump Statements The keyword break and continue are often used in repetition structures to provide additional controls. break: the loop is terminated right after a break statement is executed. continue:
More informationIntroduction to Object-Oriented Programming
Introduction to Object-Oriented Programming Iterators and Streams Christopher Simpkins chris.simpkins@gatech.edu CS 1331 (Georgia Tech) Iterators and Streams 1 / 20 The Collections Framework A collection
More informationShort Notes of CS201
#includes: Short Notes of CS201 The #include directive instructs the preprocessor to read and include a file into a source code file. The file name is typically enclosed with < and > if the file is a system
More informationJump Statements. The keyword break and continue are often used in repetition structures to provide additional controls.
Jump Statements The keyword break and continue are often used in repetition structures to provide additional controls. break: the loop is terminated right after a break statement is executed. continue:
More informationChapter 13. Interfaces and Inner Classes
Chapter 13 Interfaces and Inner Classes Interfaces An interface is something like an extreme case of an abstract class However, an interface is not a class It is a type that can be satisfied by any class
More informationChapter 17: Nested Classes
http://www.icce.rug.nl/documents/cplusplus/cplusplus17.html Table of Contents Previous Chapter Next Chapter Chapter 17: Nested Classes Classes can be defined inside other classes. Classes that are defined
More informationCS201 - Introduction to Programming Glossary By
CS201 - Introduction to Programming Glossary By #include : The #include directive instructs the preprocessor to read and include a file into a source code file. The file name is typically enclosed with
More informationCS1150 Principles of Computer Science Loops (Part II)
CS1150 Principles of Computer Science Loops (Part II) Yanyan Zhuang Department of Computer Science http://www.cs.uccs.edu/~yzhuang CS1150 UC. Colorado Springs Review Is this an infinite loop? Why (not)?
More informationPrinciples of Object Oriented Programming. Lecture 4
Principles of Object Oriented Programming Lecture 4 Object-Oriented Programming There are several concepts underlying OOP: Abstract Types (Classes) Encapsulation (or Information Hiding) Polymorphism Inheritance
More informationThe Essence of OOP using Java, Nested Top-Level Classes. Preface
The Essence of OOP using Java, Nested Top-Level Classes Baldwin explains nested top-level classes, and illustrates a very useful polymorphic structure where nested classes extend the enclosing class and
More informationProgramming Constructs Overview. Method Call System.out.print( hello ); Method Parameters
Programming Constructs Overview Method calls More selection statements More assignment operators Conditional operator Unary increment and decrement operators Iteration statements Defining methods 27 October
More information1.00 Introduction to Computers and Engineering Problem Solving. Quiz 1 March 7, 2003
1.00 Introduction to Computers and Engineering Problem Solving Quiz 1 March 7, 2003 Name: Email Address: TA: Section: You have 90 minutes to complete this exam. For coding questions, you do not need to
More informationEncapsulation in Java
Encapsulation in Java EECS2030: Advanced Object Oriented Programming Fall 2017 CHEN-WEI WANG Encapsulation (1.1) Consider the following problem: A person has a name, a weight, and a height. A person s
More informationDesign to interfaces. Favor composition over inheritance Find what varies and encapsulate it
Design Patterns The Gang of Four suggests a few strategies for creating good o-o designs, including Façade Design to interfaces. Favor composition over inheritance Find what varies and encapsulate it One
More informationUnderstanding class definitions
Objects First With Java A Practical Introduction Using BlueJ Understanding class definitions Looking inside classes 2.1 Looking inside classes basic elements of class definitions fields constructors methods
More informationITI Introduction to Computing II
ITI 1121. Introduction to Computing II Marcel Turcotte School of Information Technology and Engineering Iterator (part II) Inner class Implementation: fail-fast Version of March 20, 2011 Abstract These
More informationOutline. Why Java? (1/2) Why Java? (2/2) Java Compiler and Virtual Machine. Classes. COMP9024: Data Structures and Algorithms
COMP9024: Data Structures and Algorithms Week One: Java Programming Language (I) Hui Wu Session 2, 2016 http://www.cse.unsw.edu.au/~cs9024 Outline Classes and objects Methods Primitive data types and operators
More informationCSCI 135 Exam #2 Fundamentals of Computer Science I Fall 2013
CSCI 135 Exam #2 Fundamentals of Computer Science I Fall 2013 Name: This exam consists of 6 problems on the following 6 pages. You may use your two-sided hand-written 8 ½ x 11 note sheet during the exam.
More informationObject Orientation Fourth Story. Bok, Jong Soon
Object Orientation Fourth Story Bok, Jong Soon javaexpert@nate.com www.javaexpert.co.kr abstract Methods Java allows you to specify that a superclass declares a method that does not supply an implementation.
More informationThe data in the table are arranged into 12 rows and 12 columns. The process of printing them out can be expressed in a pseudocode algorithm as
Control structures in Java are statements that contain statements. In particular, control structures can contain control structures. You've already seen several examples of if statements inside loops,
More informationSchool of Computer Science CPS109 Course Notes 6 Alexander Ferworn Updated Fall 15. CPS109 Course Notes 6. Alexander Ferworn
CPS109 Course Notes 6 Alexander Ferworn Unrelated Facts Worth Remembering Use metaphors to understand issues and explain them to others. Look up what metaphor means. Table of Contents Contents 1 ITERATION...
More informationG Programming Languages - Fall 2012
G22.2110-003 Programming Languages - Fall 2012 Lecture 3 Thomas Wies New York University Review Last week Names and Bindings Lifetimes and Allocation Garbage Collection Scope Outline Control Flow Sequencing
More informationPROGRAMMING III OOP. JAVA LANGUAGE COURSE
COURSE 3 PROGRAMMING III OOP. JAVA LANGUAGE PREVIOUS COURSE CONTENT Classes Objects Object class Acess control specifier fields methods classes COUSE CONTENT Inheritance Abstract classes Interfaces instanceof
More informationOracle 1Z Java Certified Programmer. Download Full Version :
Oracle 1Z0-501 Java Certified Programmer Download Full Version : http://killexams.com/pass4sure/exam-detail/1z0-501 Answer: F QUESTION: 137 Which can be used to decode chars for output? A. Java.io.InputStream.
More informationCHAPTER 7 OBJECTS AND CLASSES
CHAPTER 7 OBJECTS AND CLASSES OBJECTIVES After completing Objects and Classes, you will be able to: Explain the use of classes in Java for representing structured data. Distinguish between objects and
More information