I have uploaded that question 2 times , please someone solve it correctly

A prefix is a substring taken from the beginning of a word. "Mo" is a prefix (of length 2) of the word "Mother". Given a string, consider the prefix string made of the first N chars. Does that prefix string appear somewhere else in the string? Write a Java method that returns true if that prefix appear somewhere else in the string, and returns false if not. Your method should be case sensitive^1. Assume that the string is not empty and that 1