Insertion Sort Algorithm - Sorting in Arrays | JAVA DSA COURSE

Welcome to another deep-dive Java DSA tutorial!
In this lecture, we will learn Insertion Sort Algorithm in Java with the easiest explanation, step-by-step logic, real-life analogy, complete dry run, and full Java code.

Whether you're a beginner, a college student, or preparing for coding interviews, this video will help you understand how Insertion Sort really works internally — in the simplest and most intuitive way.

🔍 What You Will Learn in This Lecture

✔ What is Insertion Sort?
✔ Why is it similar to sorting playing cards?
✔ How elements are shifted (not swapped)
✔ What is the "key" element?
✔ Step-by-step algorithm
✔ Easy dry run example: [5, 2, 4, 6, 1]
✔ Logic behind right shifting
✔ Final insertion of the key
✔ Full working Java program
✔ Best, Worst, and Average Case Time Complexity
✔ Space Complexity
✔ When to use Insertion Sort
✔ Advantages & Disadvantages
✔ Interview relevance
✔ Common mistakes beginners make

📘 Insertion Sort Explained Simply

Insertion Sort is a simple comparison-based sorting technique where we build the final sorted array one element at a time.
Exactly like how you sort playing cards in your hand — take a new card, compare with previous cards, shift bigger cards to the right, and place your card in the right position.

🧠 Time & Space Complexity
Case Complexity
Best Case O(n) when array is already sorted
Average Case O(n²)
Worst Case O(n²) when array is reverse sorted
Space Complexity O(1) (in-place algorithm)

Insertion Sort is very efficient on:
✔ small arrays
✔ nearly sorted data
✔ real-time data streams
✔ adaptive sorting scenarios

🧪 Example Covered in Lecture

Array: [5, 2, 4, 6, 1]
We pick each element as key, shift bigger elements, and insert it into correct place.

You will see the entire dry run, including:
➡ shifting
➡ key placement
➡ why j-- is used
➡ how arr[j+1] = key works

💻 Full Java Code Included in the Lecture

The lecture explains the complete Java code for Insertion Sort:

Taking key

Comparing

Shifting

Inserting

Super clean explanation for beginners!

📚 Complete DSA Series (Pattern Printing + Arrays + Searching + Sorting)

This lecture is part of the Sorting Algorithms playlist where we cover:

Bubble Sort

Selection Sort

Insertion Sort

Merge Sort

Quick Sort

Counting Sort

And more…

🔗 GitHub Code (All Java Programs + Notes)

📂 GitHub Repository:
https://github.com/code-push28/java-c...

📩 Contact & Socials

📧 Email: codepush28@gmail.com

📱 Instagram: https://www.instagram.com/code_push?i...

Follow for more Java, DSA & Coding Interview content!

👍 Support the Channel

If this video helped you:
✔ Like
✔ Comment your doubts
✔ Subscribe
✔ Share with your friends preparing for placements

Let’s grow together and master Java DSA step by step! 🚀

----------------------------------
insertion sort java
insertion sort algorithm
insertion sort explained
java sorting algorithms
java insertion sort tutorial
insertion sort dry run
insertion sort step by step
java dsa sorting
sorting algorithms in java
java dsa playlist
dsa for beginners
data structures and algorithms java
java coding interview questions
sorting in java
java array sorting
simple insertion sort explanation
insertion sort logic
right shifting in insertion sort
java programming for beginners
java tutorials for students
java full course dsa
placement preparation java
coding interview java
java code explanation
insertion sort time complexity
o n square sorting algorithm
java programming tutorials
java step by step explanation
insertion sort best case
insertion sort worst case
java beginner projects
java arrays tutorial
sorting playlist java
easy sorting algorithms
understanding insertion sort
insertion sort code java
dsa sorting algorithms
java explanation for beginners
java algorithm dry run
array sorting techniques
java for placements
java college students tutorial
data structures java
java interview preparation
java dsa youtube
java coding practice
how insertion sort works
why right shifting insertion sort
key element insertion sort
learn java dsa fast
java github repository
java coding questions
java programming series
java full explanation