28 May Markham Saturday 14:00 Java Homework 20.05.23.
Question: Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Sample Input 1: Apple Sample Output 1: 0 Explanation: “a” is the first character which is not repeating in the string apple and occur only once. Sample Input 2: lovelivesure Sample Output 2: 1 Explanation:...