Tasks Planner

package MidExamPrep;

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

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

        List<String>numbers=Arrays.stream(scanner.nextLine()
                .split(" "))
                .collect(Collectors.toList());

        List<Integer>task=new ArrayList<>();

        for (String n:numbers) {
            int number=Integer.parseInt(n);
            task.add(number);
        }
        String input=scanner.nextLine();

        while (!input.equals("End")){
            String[]parameter=input.split(" ");
            String command=parameter[0];

            if (command.equals("Complete")){
                int index=task.indexOf(task.get(Integer.parseInt(parameter[1])));

                if (task.contains(task.get(Integer.parseInt(parameter[1])))){
                    task.set(index,0);
                }
            }else if (command.equals("Change")){
                int index=task.indexOf(task.get(Integer.parseInt(parameter[1])));
                int time=Integer.parseInt(parameter[2]);
                if (task.contains(task.get(Integer.parseInt(parameter[1])))){
                    task.set(index,time);
                }
            }else if (command.equals("Drop")){
                int index=task.indexOf(task.get(Integer.parseInt(parameter[1])));
                if (task.contains(task.get(Integer.parseInt(parameter[1])))){
                    task.set(index,-1);
                }
            }else if (parameter[1].equals("Completed")){
                int completed=0;
                for (int num:task) {
                    if(num==0){
                        completed++;
                    }
                }
                System.out.print(completed);

            }else if (parameter[1].equals("Dropped")){
                int dropped=0;
                for (int num:task) {
                    if (num<=-1){
                        dropped++;
                    }
                }
                System.out.print(dropped);
            }else if (parameter[1].equals("Incomplete")){
                int incomplete=0;
                for (int num:task) {
                    if (num>=1&&num<=5){
                        incomplete++;
                    }
                }
                System.out.print(incomplete);
            }




            input=scanner.nextLine();
        }
        System.out.println();
        for (int num:task) {
            if (num>0 && num<=5){
                System.out.print(num+" ");
            }
        }

    }
}