Outlines of this lecture: - Array Initialization - Copy Array - Arrays as Parameters - Private Arrays - Multi-Dimensional Arrays - Collections - Iterator Interface - Array List Class - Tree Set Class - Map Interface - Tree Map Class - Sorting - Stack Class

1. P.1
Arrays & Java Collections Framework
ghadeer-al-hasan ghadeerof@gamil.com

2. Array Example: P.2

3. Array Example: P.3

4. Array Example: P.4
 In Java all array are object

5. Array Initialization: P.5

6. Object Array: P.6

7. Copy Arrays: P.7

8. Example Parameters : P.8

9. Arrays Parameters: P.9

10. Arrays Parameters: P.10

11. Arrays Parameters: P.11

12. Arrays Parameters: P.12

13. Private Arrays: P.13
For primitive data type we can use clone method, but for complex type we need
deep copy; override clone.

14. Multidimensional Arrays: P.14

15. Collections: P.15
 Is a framework that provides an architecture to store and manipulate the
group of objects.
Framework in Java:
• Provide readymade architecture.
• Represents set of classes and interface.
• Is optional.

16. Iterator Interface: P.16
 Iterator interface provides the facility of iterating the elements in forward
direction only.
Methods of Iterator interface:
There are only three methods in the Iterator interface.
1. Public Boolean hasNext(): is returns true if iterator has more elements.
2. Public object next(): is returns the element and moves the cursor pointer to the next
element.
3. Public void remove(): it removes the last elements returned by the iterator.

17. ArrayList Class: P.17

18. ArrayList Cont. : P.18

19. ArrayList Cont. : P.19

20. ArrayList Methods: P.20

21. ArrayList Methods: P.21

22. TreeSet Class: P.22

23. Map Interface P.23
 It contains values based on the key,
 Key and value pair.
 Each pair is know as an entry.
 It contains only unique elements.
Entry:
 It is the subinterface of Map.
 It provides methods to get key and value.

24. TreeMap class: P.24
 It contains values on the key.
 It contains only unique elements.
 It cannot have null key can have multiple null values.
 It maintains ascending order

25. Sorting : P.25
 We can sort the elements of:
 String object.
 Wrapper class objects.
 User-defined class objects.

26. Sorting Cont. : P.26

27. Stack class : P.27

28. The End
ghadeer-al-hasan ghadeerof@gamil.com