P2_ChangeList_Lists_Ex

package feb20_Lists_Exercises;

import java.util.List;
import java.util.Arrays;
import java.util.Scanner;
import java.util.stream.Collectors;

public class P2_ChangeList_B {
    public static void main(String[] args) {
        @SuppressWarnings("resource")

        Scanner sc = new Scanner(System.in);

        List<Integer> numbers = Arrays.stream(sc.nextLine().split("\\s+")).map(Integer::parseInt)
                .collect(Collectors.toList());

        String command = "";

        while (!"end".equals(command = sc.nextLine())) {
            String[] input = command.split("\\s+");
            String operation = input[0];
            int element = Integer.parseInt(input[1]);

            switch (operation) {
            case "Delete":
                numbers = numbers.stream().filter(e -> e != element).collect(Collectors.toList());
                break;
            case "Insert":
                int position = Integer.parseInt(input[2]);
                if (position >= 0 && position < numbers.size()) {
                    numbers.add(position, element);
                }
                break;
            }
        }

        System.out.println(numbers.toString().replaceAll("\\[|,|\\]", ""));
    }
}