Which of the following built-in string methods can be used to find the character at a specific index position?length()charAt()main()toUpperCase()

Break Down the Problem

1. Identify the purpose of each method listed in the options.
2. Determine which method is used specifically to find a character at a specific index in a string.

Relevant Concepts

• length(): This method returns the number of characters in a string.
• charAt(): This method returns the character at a specified index in a string.
• main(): This is not a string method but rather the entry point for execution in Java programs.
• toUpperCase(): This method converts all characters in a string to uppercase.

Analysis and Detail

• length() does not provide access to a specific character; it only returns the total length of the string.
• charAt() is explicitly designed to return a character located at a specified index, thus it is the correct choice.
• main() has no relevance to string manipulation; it is a method used for program execution.
• toUpperCase() changes the case of letters but does not address index positions.

Verify and Summarize

Given the definitions and intended usages of the methods, it's clear that only charAt() serves the purpose of finding a character at a specific index position in a string.

Final Answer

The correct method to find the character at a specific index position is charAt().