Question

Re-do Problem 2, but now implement the following method: public static void deleteEvenNumbers() This method must delete all even numbers in the chain pointed to by aList, while preserving the original of the remaining numbers. For example, if aList is this list: 3, 9, 2, 10, 5, 6; the list becomes after calling the method as follows: 3, 9, 5.

useing netbeans

Answer 1

import java.util.*;
public class Main
{
    public static void deleteEvenNumbers(List<Integer>numbers)
    {

        // Iterator = An iterator over a collection/List, hasNext()=Returns true if iteration has more elements, next()=Returns next element in a collection/List

        for (Iterator<Integer> iterator = numbers.iterator(); iterator.hasNext();){
            Integer number = iterator.next();

       // Checks if number is even or not
                if (number % 2 == 0) {

      //remove the number if its even
                    iterator.remove();
                }
            }
    }
  
   public static void main(String[] args)
   {
          

//Creating an empty List to test our method

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

//Adding the elements inside the List
           numbers.add(11);
           numbers.add(45);
           numbers.add(12);
           numbers.add(32);
           numbers.add(36);  

//Printing the List before calling the method deleteEvenNumbers(List<Integer>numbers)
           System.out.println(numbers);
           deleteEvenNumbers(numbers);

//Printing the List after calling the method deleteEvenNumbers(List<Integer>numbers)
           System.out.println(numbers);

  
   }
}