LeetCode 151: Reverse Words in a String | Java Solution | Two-Pointer Approach
📝 A simple yet tricky #string manipulation problem where we need to reverse the order of words in a string while removing extra spaces. #leetcode #java #stringmanipulation
⏱️ **Time Complexity**: O(n)
🗂️ **Space Complexity**: O(n)
Timestamps:
00:00 - Understanding problem statement
00:50 - Using String Manipulation
01:57 - Big O notation explained
02:16 - Java solution walk-through
02:47 - Solution analysis - runtime + memory
Key Concepts:
String manipulation
Two-pointer technique
In-place operations
Character array processing
Space management in strings
Main Learning Points:
How to efficiently reverse words without using built-in split functions
Managing whitespace in string manipulation problems
Implementing in-place string operations for optimal space complexity
Handling edge cases in string processing
Related Problems:
LeetCode 186: Reverse Words in a String II
LeetCode 557: Reverse Words in a String III
LeetCode 344: Reverse String
LeetCode 58: Length of Last Word
Target Audience:
This video is perfect for intermediate programmers preparing for coding interviews, especially those focused on string manipulation questions at companies like Amazon, Microsoft, and Facebook.
Prerequisites:
Basic Java knowledge
Understanding of string operations
Familiarity with array manipulation
Useful Links:
LeetCode problem: https://leetcode.com/problems/reverse...
Solution code: https://leetcode.com/problems/reverse...
Additional Tips:
💡 Watch out for leading, trailing, and multiple spaces between words
💡 Consider using StringBuilder for better performance in production code
💡 This problem tests your ability to handle edge cases in string processing
Call to Action:
If you found this solution helpful, please like and subscribe for more coding interview preparation videos! Share your approach or questions in the comments below. #codinginterview #algorithmpractice #javaprogramming
On this page of the site you can watch the video online LeetCode 151: Reverse Words in a String | Java Solution | Two-Pointer Approach with a duration of hours minute second in good quality, which was uploaded by the user Code Scribbler 13 June 2025, share the link with friends and acquaintances, this video has already been watched 470 times on youtube and it was liked by 6 viewers. Enjoy your viewing!
