Question

1.) Letters is an ArrayList that has a bunch of letters contains "A" (eg {"A","A","B","A"}). Does the following code correctly remove all elements with value "A" from the list? Explain the details during each iteration.

for (int i = 0; i < letters.size(); i++)

  letters.remove("A");

2.) Write codes that will remove all the 'A':

Answer 1

1)
This won't work. If the arraylist contains only letter "A" then this code removes all "A".
In otherwords, this code only works if all the elements of arraylist are "A".
Because if there are 3 "A"'s but if we run remove 4 times then it will give error.

2)

while (letters.contains("A")){
  letters.remove(letters.indexOf("A"));
}