Solving the 'Removing Stars From a String' Problem in Java LeetCode 75 Study Plan

In this video, we're tackling a problem from the LeetCode 75 Study Plan series, specifically in the Stack category. The problem involves removing certain characters from a string - the character that precedes the '*' character.

Our solution revolves around using a Stack data structure, which is perfect for tackling problems where the most recent elements matter the most, which aligns with the "last-in, first-out" (LIFO) principle of Stack.

We traverse the given string, pushing each character onto the Stack unless it's a ''. When we encounter a '', we pop the most recent character off the Stack. This effectively removes the character preceding each '*' in the string.

After processing the string in this manner, we convert the remaining characters in the Stack to a string using a StringBuilder, and return this final result.

This approach has a time and space complexity of O(n), making it efficient for large inputs. Tune in to see a step-by-step walkthrough of this solution and gain a better understanding of using Stacks in problem-solving.