The JSP language uses Java syntax to create online websites. You use the "toUpperCase" function to convert a string value to all uppercase letters.

Java provides such assistance through the Character, String, StringBuffer, and StringTokenizer classes. In this article, you’ll create objects from these classes and examine their various methods.

This function reverses only the vowels in a given string while keeping the other characters in place. It uses **two pointers** to achieve an **O(n) time complexity** efficiently. ##Step-by-Step ...