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?

Standard Interface

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:

Standard Interface

What is the Collection Framework?

The Java Collection Framework (JCF) is a unified architecture for storing, retrieving, and manipulating groups of objects.

It includes:

Standard Interface

  • Fixed size
  • No built-in methods for sorting, searching, etc.
  • ​Poor performance for dynamic data management

Before collections, Java used arrays, which had several limitations:

  • Dynamic memory management
  • Ready-made data structures (List, Set, Map)
  • Efficient algorithms for sorting, searching, shuffling
  • Interoperability between different collection types

Advantages of Collection Framework

Why Needed?

Java Collections Framework Hierarchy

Core Interfaces and Purpose

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)

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