O1. World Tour / FinalExam - O2

package FinalExam.O2;

import java.util.Scanner;

public class O1WorldTour {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder input = new StringBuilder(scanner.nextLine());
        String command = scanner.nextLine();

        while (!command.equals("Travel")) {
            String[] type = command.split(":");
            switch (type[0]) {
                case "Add Stop":
                    if (Integer.parseInt(type[1]) >= 0 && Integer.parseInt(type[1]) < input.length()) {
                        input.insert(Integer.parseInt(type[1]), type[2]);
                    }
                    System.out.println(input);
                    break;
                case "Remove Stop":
                    int startIndex = Integer.parseInt(type[1]);
                    int endIndex = Integer.parseInt(type[2]);

                    if (startIndex >= 0 && endIndex >= 0 && startIndex < input.length() && endIndex < input.length()) {
                        input.delete(startIndex, endIndex + 1);
                    }
                    System.out.println(input);
                    break;
                case "Switch":
                    input = new StringBuilder(input.toString().replace(type[1], type[2]));
                    System.out.println(input);
                    break;
            }
            command = scanner.nextLine();
        }
        System.out.println("Ready for world tour! Planned stops: " + input);
    }
}