This is a zero-parameter lambda expression! ... It is not mandatory to use parentheses if the type of that variable can be inferred from the context. Parentheses are optional if the compiler can infer the parameter type from the functional interface. ... import java.util.ArrayList; public class GFG{ public static void main(String[] args){ ArrayList<Integer> list = new ArrayList<>(); list.add(1); list.add(2); list.add(3); System.out.println("All elements:"); list.forEach(n -> System.out.println(n)); System.out.println("Even elements:"); list.forEach(n -> { if (n % 2 == 0) System.out.println(n); }); } }

In this video , I have covered Lambdas from scratch , also showing you , how would you pass functions in Java , even without Lambdas. N.B - I told that lambd...