ToDoList

import java.util.*;
class Todo{
    String name;
    Map<String, List<String>>  todo;
    public  Todo(String name){
         this.name=name;
         this.todo=new HashMap<>();
     }
     public void addTodo(String n,List<String> task){
              todo.put(n,task);
     }
    public void displayTodo(String n){
        if(todo.containsKey(n)){
            System.out.println(todo.get(n));
        }
     }
}

public class Task {
    public static void main(String[] args) {
        Scanner ob=new Scanner(System.in);
       ArrayList<String> task;
        Todo objTodo=null;
        while(true){
            System.out.println("1.Create a list");
            System.out.println("2.Display my List");
            System.out.println("Enter your choice");
            int ch=ob.nextInt();
            switch (ch){
                case 1:{
                    System.out.println("Enter your name!");
                    String name=ob.next();
                   objTodo= new Todo(name);
                 System.out.println("Enter the number of tasks to be completed");
                  int n=ob.nextInt();
                  ArrayList<String> tasklist=new ArrayList<>();
                    System.out.println("Enter your tasks");
                   for(int i=0;i<n;i++){
                  String list=ob.next();
                  tasklist.add(list);
                  }
                   objTodo.addTodo(name,tasklist);
                   }
                break;
                case 2:{
                    if (objTodo != null) {
                        ob.nextLine();
                        System.out.print("Enter your name to see the tasks: ");
                        String na = ob.nextLine();
                        objTodo.displayTodo(na);
                    } else {
                        System.out.println("No tasks created yet.");
                    }
                }
            }
        }
    }
}