Framework Fusion
Mastering Java
Learning Outcome
3
Identify the limitations of arrays and how collections solve them.
2
Explain the purpose and structure of the Java Collection Framework
1
Understand the concept of a framework
Basic Java concepts: OOPs (class, object, inheritance, polymorphism)
Generics (e.g., List<String>)
Wrapper classes & Autoboxing
Equals() and hashCode() methods
Iteration concepts (for-each loop, Iterator)
Before Starting ,Lets Recall
What is a Framework in Java?
A framework is a predefined structure or set of reusable classes and interfaces that helps developers build applications efficiently. It acts as a skeleton or scaffolding for software development.
Offers pre-built standard functionalities so developers don't have to write common code from scratch.
Provides essential tools, comprehensive libraries, and API sets needed for development.
Key Features:
What is the Collection Framework?
The Java Collection Framework (JCF) is a unified architecture for storing, retrieving, and manipulating groups of objects.
It includes:
1
2
3
Java mainly used arrays, which had fixed size and were not dynamic.
Only Arrays Were Available:
No Standard Data Structures:
There were no built-in List, Set, or Map implementations.
More Coding & Complexity:
Developers had to manually write logic for sorting, searching, etc.
Problems Before JCF
Dynamic Data Structures
Introduced classes like ArrayList and LinkedList that resize automatically.
Ready-Made Implementations
Provided built-in List, Set, Map, and Queue data structures.
Built-in Algorithms
Collections class provides sorting, searching, and other utility methods.
How JCF Solved These Problems
Java Collections Framework Hierarchy
Interface
Purpose
List
Set
Queue
Deque
Map
|
Ordered collection, allows duplicates |
No duplicate elements
|
Processes elements in FIFO order |
|
Allows insertion/removal from both ends |
|
Stores key–value pairs (unique keys) |
Interface
Purpose
List
Set
Queue
Deque
Map
|
Ordered collection, allows duplicates |
No duplicate elements
|
Processes elements in FIFO order |
|
Allows insertion/removal from both ends |
|
Stores key–value pairs (unique keys) |
Interface
Purpose
List
Set
Queue
Deque
Map
|
Ordered collection, allows duplicates |
No duplicate elements
|
Processes elements in FIFO order |
|
Allows insertion/removal from both ends |
|
Stores key–value pairs (unique keys) |
Interface
Purpose
List
Set
Queue
Deque
Map
|
Ordered collection, allows duplicates |
No duplicate elements
|
Processes elements in FIFO order |
|
Allows insertion/removal from both ends |
|
Stores key–value pairs (unique keys) |
SortedSet
|
Set that maintains ascending order |
|
NavigableSet |
|
SortedMap |
|
Map that maintains sorted keys |
|
SortedSet with navigation methods |
|
NavigableMap |
|
SortedMap with navigation methods |
Summary
4
Advantages: ready-made data structures and efficient algorithms.
3
Solves array limitations
2
JCF manages groups of objects with List, Set, Queue, Map.
1
Framework are reusable classes and interfaces for efficient coding.
Quiz
Which interface in the Collection Framework is the root of all collection types?
A. List
B. Map
C. Collection
D. Queue
Which interface in the Collection Framework is the root of all collection types?
A. List
B. Map
C. Collection
D. Queue
Quiz-Answer
