Question

Create a method removeEvens that removes all even elements from an ArrayList of Integers. The method should also print all the remaining items in the ArrayList.

Once the method is created, call it on the existing ArrayList in the main method.
Someone please help im really confused

Answer 1

The removeEvens method should iterate through an ArrayList of Integers in reverse, removing even elements. It also prints the remaining elements. Proper iteration is critical to avoid exceptions.

Step-by-step explanation:

The question asks to create a method removeEvens that takes an ArrayList of Integers as an argument and removes all even numbers from it. After the evens are removed, the method should print out the remaining elements of the ArrayList. The concept here is to iterate through the ArrayList using a loop, check if elements are even, and if so, remove them. Care should be taken when removing elements from an ArrayList while iterating over it to avoid ConcurrentModificationException. One way to handle this is by using an Iterator or iterating backwards. Here is an illustrative example:

public void removeEvens(ArrayList list) {
for(int i = list.size() - 1; i >= 0; i--) {
if(list.get(i) % 2 == 0) {
list.remove(i);
}
}
for(Integer number : list) {
System.out.println(number);
}
}

In the main method, you would have an ArrayList of Integers to which this method can be applied:

public static void main(String[] args) {
ArrayList numbers = new ArrayList(Arrays.asList(1, 2, 3, 4, 5, 6));
removeEvens(numbers); // This will call the method
}

Answer 2

To remove all even elements from an ArrayList of Integers, you can iterate over the ArrayList and remove any elements that are divisible by 2.

Step-by-step explanation:

To remove all even elements from an ArrayList of Integers, you can iterate over the ArrayList and remove any elements that are divisible by 2. You can use the % operator to check for divisibility. Here's how you can implement the removeEvens method:

public static void removeEvens(ArrayList list) {
Iterator iterator = list.iterator();
while (iterator.hasNext()) {
int num = iterator.next();
if (num % 2 == 0) {
iterator.remove();
}
}
for (int num : list) {
System.out.println(num);
}
}

In the main method, you can call the removeEvens method passing the ArrayList as an argument:

public static void main(String[] args) {
ArrayList list = new ArrayList();
// Add elements to the list
removeEvens(list);
}

This code will remove all even elements from the ArrayList and print the remaining items.