exam 2problem

package com.company;


import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class Main {

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

        String[] input = scanner.nextLine().split(" +");
        List<Integer>numbers=new ArrayList<>();
        //int[] numbers = new int[input.length];
        for (int i = 0; i < input.length; i++) {
            numbers.add(Integer.parseInt(input[i]));
        }
        List<Integer>negative=new ArrayList<>();
        List<Integer>positive=new ArrayList<>();
        int sumPositive=0;
        int sumNegative=0;
        int sumAll=0;
       // int numberToSwitch = 0;

        String command = scanner.nextLine();
        while (!command.equals("End")) {

            String[] tokens = command.split(" +");

            if (command.contains("Switch")) {
                int index = Integer.valueOf(tokens[1]);// -4
                   //index = Math.abs(Integer.valueOf(tokens[1]));
                    if (index >= 0 && index < numbers.size()) {
                       int numberToSwitch = numbers.get(index);
                        if (numberToSwitch != 0) {

                                numberToSwitch *= -1;
                                numbers.set(index,numberToSwitch);
                                if(numberToSwitch<0) {
                                    negative.add(numberToSwitch);
                                }
//                                }else if(numberToSwitch>0){
//                                    positive.add(numberToSwitch);
//                                }
                           // System.out.println(numberToSwitch);

                        }
                    }

            }else if(command.contains("Change")){
                int index = Integer.valueOf(tokens[1]);
                if(index>=0&&index<numbers.size()){
                int numberToRemove=numbers.get(index);
                int numberToUse=Integer.parseInt(tokens[2]);


                    numberToRemove=numberToUse;
                    numbers.set(index,numberToUse);
                    if(numberToUse<0) {
                        negative.add(numberToUse);
                    }
//                    }else if(numberToUse>0){
//                        positive.add(numberToUse);
//                    }

                }

            }else if(command.contains("Sum Negative")){
                for (int i = 0; i < negative.size(); i++) {
                    sumNegative+=negative.get(i);

                }
                System.out.print(sumNegative);
            }else if(command.contains("Sum Positive")){
//                for (int i = 0; i < positive.size(); i++) {
//                    sumPositive+=positive.get(i);
//                }
                for (int i = 0; i < numbers.size(); i++) {
                    if(numbers.get(i)>=0){
                        sumPositive+=numbers.get(i);
                        positive.add(numbers.get(i));
                    }
                }
                System.out.print(sumPositive);
            }else if(command.contains("Sum All")){
                for (int i = 0; i < numbers.size(); i++) {
                    sumAll+=numbers.get(i);
                }
                System.out.print(sumAll);
            }


            command = scanner.nextLine();

        }
        System.out.println();

        for (int i = 0; i < numbers.size(); i++) {
            if(numbers.get(i)>=0){
                System.out.print(numbers.get(i)+" ");
            }
        }



    }

}