What is the output of the following?
20: List<Character> chars = new ArrayList<>(); 21: chars.add('a'); 22: chars.add('b'); 23: chars.set(1, 'c'); 24: chars.remove(0); 25: System.out.print(chars.length());
Line 25 does not compile.
On an ArrayList, the method to get the number of elements is size.
length() method is used for a String or StringBuilder.