Aggiunti esercizi test capitolo 11

src/com/oracle/java8/professional/exam/ExamChapter11.java

@@ -0,0 +1,24 @@
+package com.oracle.java8.professional.exam;
+
+import java.util.*;
+
+public class ExamChapter11 {
+
+	public static void main(String[] args) {
+	}
+
+	public static void iterator() {
+		List<Integer> l = Arrays.asList(1, 2, 3, 4);
+		for (Iterator<Integer> i = l.iterator(); i.hasNext(); i.next())
+			System.out.println(i.next());
+	}
+
+	public static <T> Set<T> intersaction(Set<? extends T> a, Set<?> b) {
+		Set<T> result = new HashSet<>();
+		for (T t : a) {
+			if (b.contains(t))
+				result.add(t);
+		}
+		return result;
+	}
+}