String.charAt

Description

The charAt() method returns the char value at the specified index in a string. An index ranges from 0 to length() - 1. The first character is at index 0, the last at length() - 1.

If the index argument is negative or not less than the length of this string, a StringIndexOutOfBoundsException is thrown. Always validate the index before calling this method if the input is dynamic.

This method is commonly used for character-by-character processing of strings, such as parsing, validation, or transformation tasks where each character must be examined individually.

Arguments

Example

String s = "Hello";
char c = s.charAt(0); // 'H'
char d = s.charAt(4); // 'o'

Reference

• Official Documentation