How Arrays work in Java | Heap, Contiguous Storage, Random Access | Java Full Course #10
This is Part 2 of the Arrays.
In Part 1, we learned array syntax, declaration, and traversal.
In this video, we go much deeper.
We will understand:
• Why arrays are stored in contiguous memory
• How arrays are allocated in Heap memory
• What happens inside JVM when you create an array
• Stack vs Heap memory for arrays
• How memory indexing actually works
• Why array access is O(1)
• Performance implications of arrays
• What really happens when you write new int[5]
If you want to understand Java beyond surface-level syntax, this lecture is essential.
This is not just coding.
This is internal understanding.
Why Learn Java?
Java is one of the most powerful and widely used programming languages in the world.
It is used in:
Backend development
Enterprise applications
Android development
Banking systems
Large-scale distributed systems
If you want to master Data Structures, Spring Boot, Microservices, or System Design, Java fundamentals are essential.
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Timestamps:
00:00 Intro
00:20 Random Access in Array
02:40 How Arrays are stored in memory
09:43 Random access in arrays
17:50 Base Address of Arrays
20:23 Special case of Booleans
27:37 ArrayIndexOutOfBound Exception
30:41 2D Arrays in Memory
36:21 Random Access in 2D Arrays
45:35 Array of Strings
51:16 Benifit of Random Access
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