Test

BiFunction.java

import java.util.function.BiFunction; 

public class Main { 
	public static void main(String args[]) 
	{ 
		BiFunction<Integer, Integer, Integer> composite1 = (a, b) -> a + b; 

		composite1 = composite1.andThen(a -> 2 * a); 

		System.out.println("Composite1 = " + composite1.apply(2, 3)); 
	} 
} 
// What is the output?

Generics.java

List<?> listOfAnyType;
List<Object> listOfObject = new ArrayList<Object>();
List<String> listOfString = new ArrayList<String>();
List<Integer> listOfInteger = new ArrayList<Integer>();

// Which of the following assignment is legal?
listOfAnyType = listOfString;
listOfAnyType = listOfInteger;
listOfObjectType = (List<Object>) listOfString;