O5. LIst Manipulation Advanced / List Lab

package ListLab;

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

public class O5LIstManipulationAdvanced {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        List<Integer> a = Arrays.stream(scanner.nextLine().split("\\s+")).
                map(Integer::parseInt).collect(Collectors.toList());
        String input = scanner.nextLine();
        while (!input.equals("end")) {

            String[] command = input.split(" ");
            switch (command[0]) {
                case "Contains":
                    int magicNumber = Integer.parseInt(command[1]);
                    int yes = 0;
                    for (Integer integer1 : a) {
                        if (integer1 == magicNumber) {
                            yes += 1;
                        }
                    }
                    if (yes > 0) {
                        System.out.println("Yes");
                    } else {
                        System.out.println("No such number");
                    }
                    break;
                case "Print":
                    if (command[1].equals("even")) {
                        for (Integer integer : a) {
                            if (integer % 2 == 0) {
                                System.out.print(integer + " ");
                            }
                        }
                    } else {
                        for (Integer integer : a) {
                            if (integer % 2 > 0) {
                                System.out.print(integer + " ");
                            }
                        }
                    }
                    System.out.println(" ");
                    break;
                case "Get":
                    int sum = 0;
                    for (Integer element : a) {
                        sum += element;
                    }
                    System.out.println(sum);
                    break;
                case "Filter":
                    int number = Integer.parseInt(command[2]);
                    switch (command[1]) {
                        case ">":
                            for (Integer item : a) {
                                if (item > number) {
                                    System.out.print(item + " ");
                                }
                            }
                            System.out.println(" ");
                            break;
                        case ">=":
                            for (Integer value : a) {
                                if (value >= number) {
                                    System.out.print(value + " ");
                                }
                            }
                            System.out.println(" ");
                            break;
                        case "<":
                            for (Integer integer : a) {
                                if (integer < number) {
                                    System.out.print(integer + " ");
                                }
                            }
                            System.out.println(" ");
                            break;
                        case "<=":
                            for (Integer integer : a) {
                                if (integer <= number) {
                                    System.out.print(integer + " ");
                                }
                            }
                            System.out.println(" ");
                            break;
                    }
                    break;
            }
            input = scanner.nextLine();
        }
    }
}