What is the Consumer Interface ? Added in Java 8 Has one abstract method `void accept(T t)` Define a Consumer that displays a number `Consumer<Integer> displayInteger = a -> System.out.println(a);` Display that number `displayInteger.accept(1);` Define a Consumer that prints a list of strings `Consumer<List<String>> displayList = list -> list.stream().forEach(a -> System.out.println(a + " ");` Define a Consumer that doubles each element in a List of integers `Consumer<List<Integer>> double = list -> { for (int i = 0; i < list.size(); i++) list.set(i, 2 * list.get(i)); };` <!--SR:!2025-11-19,1,190-->