هذه الوحدة تناقش صنف Array List وهو أحد الأصناف الجاهزة

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