Replace Repeating Chars[Mimi][Tech]

import java.util.Scanner;

public class _06_ReplaceRepeatingChars {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String input = scanner.nextLine();

        StringBuilder res = new StringBuilder();

        char previous = input.charAt(0);
        res.append(previous);
        for (int i = 1; i < input.length(); i++) {
            char currentChar = input.charAt(i);
            if (previous != currentChar) {
                previous = currentChar;
                res.append(previous);
            }
        }

        System.out.println(res);
    }
}