Part 4 - Reverse a String in Java | Two-Pointer Technique | Popular Java Interview Question

Welcome to Techie Akash!

In this video, we’ll cover one of the most common Java interview questions: How to reverse a string? We'll use the Two-Pointer Technique, a clean and efficient approach with O(n) time complexity.

Reverse a String in Java | Two-Pointer Technique | Popular Java Interview Question O(n) Time Complexity.

This is a must-know concept for coding interviews, as it demonstrates your understanding of algorithms, string manipulation, and optimization.

💡 What you’ll learn in this video:

A step-by-step explanation of how to reverse a string in Java.
The Two-Pointer Technique and why it’s efficient.
Common interview insights on why this method is preferred.

🔗 Code Example

public static String reverseString(String str) {
int left = 0;

while (left right) {
char temp = charArray[left];
charArray[left] = charArray[right];
charArray[right] = temp;
left++;
right--;
}
return new String(charArray);
}
📌 Chapters
0:00 Introduction
0:30 Explaining the Code
2:00 Why Use Two Pointers?
2:30 Conclusion

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