5 Array List, data structure course

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This document provides an introduction to and overview of the ArrayList class in Java. It discusses how ArrayLists allow for dynamic sizes unlike arrays and can store an unlimited number of objects. It also contains an example of creating and using an ArrayList to store String objects and compares the key differences between arrays and ArrayLists. The document was prepared by Mahmoud Rafeek Al-farra and includes links to additional resources on ArrayLists.

using Java
2015
Data Structure
Prepared by: Mahmoud Rafeek Al-farra
in Java
5. Array List

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Contents
Example
The ArrayList Class
Introduction
Comparison between Arrays and ArrayList

Introduction
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You can create an array to store objects. But, once
the array is created, its size is fixed.
Nevertheless, you can still use arrays to implement
dynamic data structures.
 The trick is to create a larger new array to replace
the current array, if the current array cannot hold new
elements in the list.

Introduction
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You can see an animated example from the following link:
http://www.cs.armstrong.edu/liang/animation/web/ArrayList.html

The ArrayList Class
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Java provides the ArrayList class, which can be used to
store an unlimited number of objects.
ArrayList is known as a generic class with a generic type E.
You can specify a concrete type to replace E when creating
an ArrayList.
For example:
ArrayList <String> cities = new ArrayList<> ();

The ArrayList Class
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Example: The ArrayList Class
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Comparison between Arrays and ArrayList
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Array List
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The ArrayList is in the java.util package, it is imported in line 1.
Case Study: Develop a program that prompts the user to enter a
sequence of numbers and displays the distinct numbers in the
sequence. Assume that the input ends with 0 and 0 is not counted
as a number in the sequence. [ind, N.W]

using Java
2015
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This document provides an outline and overview of the queue data structure. It defines a queue as a first-in, first-out (FIFO) structure where new items are added to the rear of the queue and items are removed from the front. The key queue operations of enqueue and dequeue are described. Code examples are provided for implementing a queue using a linked list structure with classes for the queue, its nodes, and methods for common queue operations like enqueue, dequeue, peek, clear, print, and search. Different types of queues like linear, circular, and double-ended queues are also mentioned.

Chapter 6: stack data structureMahmoud Alfarra

The document provides an overview of stack data structures, including definitions and examples. It discusses key stack operations like push, pop, peek, clear, print all, and search. Code examples are given for an Employee class and Stack class implementation to demonstrate how these operations work on a stack of employee objects. The document aims to teach the fundamentals of stack data structures and provide code samples to practice stack operations.

Chapter 5: linked list data structureMahmoud Alfarra

This document provides an outline and overview of linked lists. It defines a linked list as a collection of nodes that are linked together by references to the next node. Each node contains a data field and a reference field. It describes how to implement a linked list using a self-referential class with fields for data and a reference to the next node. It then outlines common linked list operations like insertion and deletion at different positions as well as sorting and searching the linked list.

Chapter 2: array and array list data structureMahmoud Alfarra

Chapter1 intro toprincipleofc#_datastructure_b_csMahmoud Alfarra

This document is a presentation on data structures in C# by Mr. Mahmoud R. Alfarra. It introduces C# and its uses in different applications. It covers various data types in C#, calculations and logical operations, control statements like if/else and loops. The document also discusses arrays, methods, and classes in C#. It provides examples to explain concepts like selection statements, iteration, and calling methods. The presentation aims to provide an introduction to the principles of C# for learning purposes.

Chapter 0: introduction to data structureMahmoud Alfarra

This document provides an introduction and outline for a course on data structures. It introduces the lecturer, Mahmoud Rafeek Alfarra, and lists his qualifications. It outlines the course objectives, resources, guidelines, assessment, and schedule. Key topics that will be covered include arrays, sorting and searching algorithms, linked lists, stacks, queues, trees and graphs. The document provides classifications of different types of data structures such as linear vs nonlinear, static vs dynamic memory allocation. It concludes with information about how students can be successful in the course.

3 classificationMahmoud Alfarra

8 programming-using-java decision-making practices 20102011Mahmoud Alfarra

This document is a lecture on decision making practices in Java. It identifies errors in code snippets involving if/else statements and while loops. It also contains examples to trace code with variables and determine output based on variable values. The document is in Arabic and English and presented by Mahmoud R. Alfarra on using Java and correcting errors in code involving conditional and iterative structures.

7 programming-using-java decision-making220102011Mahmoud Alfarra

This document discusses selection statements in Java including if-else statements, nested if-else statements, blocks, and switch statements. It provides examples of using these statements to check conditions, compare values, and select different code paths. It also assigns practice problems for students to write programs using selection statements to check grades, login credentials, and print days of the week.

6 programming-using-java decision-making20102011-Mahmoud Alfarra

5 programming-using-java intro-tooop20102011Mahmoud Alfarra

This document provides an introduction to object-oriented programming concepts like classes, objects, and methods in Java. It defines classes as templates that define attributes and behaviors of objects as variables and methods. Objects are instances of classes. The document explains how to declare a class with access modifiers, variables, constructors, and methods. It also demonstrates how to create objects using the new keyword and access object attributes and methods.

4 programming-using-java intro-tojava20102011Mahmoud Alfarra

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2 programming-using-java how to built applicationMahmoud Alfarra

This document discusses key concepts in programming using Java, including: 1. The programming life cycle consists of five stages: thinking, planning, designing, coding, and testing. 2. Algorithms can be represented through pseudo code and flow charts to document solutions before coding. 3. Several examples of algorithms are provided to calculate averages, check conditions, and iterate through loops.

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Chapter9 graph data structureMahmoud Alfarra

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Chapter 6: stack data structureMahmoud Alfarra

Chapter 5: linked list data structureMahmoud Alfarra

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5 Array List, data structure course

1. using Java 2015 Data Structure Prepared by: Mahmoud Rafeek Al-farra in Java 5. Array List

2. mfarra.cst.ps www.fb.com/MahmoudRFarra Contents Example The ArrayList Class Introduction Comparison between Arrays and ArrayList

3. Introduction mfarra.cst.ps www.fb.com/MahmoudRFarra You can create an array to store objects. But, once the array is created, its size is fixed. Nevertheless, you can still use arrays to implement dynamic data structures.  The trick is to create a larger new array to replace the current array, if the current array cannot hold new elements in the list.

4. Introduction mfarra.cst.ps www.fb.com/MahmoudRFarra You can see an animated example from the following link: http://www.cs.armstrong.edu/liang/animation/web/ArrayList.html

5. The ArrayList Class mfarra.cst.ps www.fb.com/MahmoudRFarra Java provides the ArrayList class, which can be used to store an unlimited number of objects. ArrayList is known as a generic class with a generic type E. You can specify a concrete type to replace E when creating an ArrayList. For example: ArrayList <String> cities = new ArrayList<> ();

6. The ArrayList Class mfarra.cst.ps www.fb.com/MahmoudRFarra

7. Example: The ArrayList Class mfarra.cst.ps www.fb.com/MahmoudRFarra

8. Example: The ArrayList Class mfarra.cst.ps www.fb.com/MahmoudRFarra

9. Comparison between Arrays and ArrayList mfarra.cst.ps www.fb.com/MahmoudRFarra

10. Array List mfarra.cst.ps www.fb.com/MahmoudRFarra The ArrayList is in the java.util package, it is imported in line 1. Case Study: Develop a program that prompts the user to enter a sequence of numbers and displays the distinct numbers in the sequence. Assume that the input ends with 0 and 0 is not counted as a number in the sequence. [ind, N.W]

11. using Java 2015 FB: M a h m o u d R F a r r a YouTube: M a h m o u d R F a r SlidesShare: mralfarra Thank you

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