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Author: AvinandanBose

EnumSetDemoA.java

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+package EnumSet;
+
+import java.util.EnumSet;
+
+import java.util.Iterator;
+import java.util.Spliterator;
+import java.util.function.Predicate;
+
+
+enum Days {
+    SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY;
+}
+
+enum Months {
+    JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER;
+}
+
+public class EnumSetDemoA {
+
+    public static void main(String[] args) {
+        EnumSet<Days> set1 = EnumSet.of(Days.MONDAY, Days.TUESDAY);
+        EnumSet<Days> set2 = EnumSet.allOf(Days.class);
+
+        EnumSet<Days> CloneOfset1;
+
+        try {
+
+            // Add
+
+            set1.add(Days.SUNDAY);
+            set1.add(Days.WEDNESDAY);
+            set1.add(Days.THURSDAY);
+            set1.add(Days.FRIDAY);
+            set1.add(Days.SATURDAY);
+            System.out.println(set1);
+
+            // Remove
+
+            set1.remove(Days.SUNDAY);
+            System.out.println(set1);
+
+            // Clear
+
+            set1.clear();
+            System.out.println(set1);
+
+            // Clone
+
+            CloneOfset1 = (EnumSet<Days>) set2.clone();
+            System.out.println(CloneOfset1);
+
+            // Iterator
+            Iterator<Days> iterator = set2.iterator();
+            while (iterator.hasNext()) {
+                System.out.println(iterator.next());
+            }
+
+            // CompareTo
+            EnumSet<Days> set3 = EnumSet.of(Days.SUNDAY, Days.MONDAY);
+            EnumSet<Days> set4 = EnumSet.of(Days.TUESDAY, Days.WEDNESDAY);
+            try {
+                Iterator<Days> iterator1 = set3.iterator();
+                Iterator<Days> iterator2 = set4.iterator();
+                while (iterator1.hasNext() && iterator2.hasNext()) {
+                    int comparison = iterator1.next().compareTo(iterator2.next());
+                    System.out.println(comparison);
+                }
+            }
+
+            // Note: CompareTo must be of Same Type
+            // Days.SUNDAY = 0 , Days.Tuesday = 2 . Hence, Comparison: 0 - 2 = -2.
+            // Days.Monday = 1 , Days.Wednesday = 3 . Hence, Comparison: 1 - 3 = -2.
+
+            catch (Exception e) {
+                System.out.println("Exception");
+
+            }
+
+            // Remove
+
+            try {
+                Iterator<Days> iterator3 = set2.iterator();
+                Enum<Days> s;
+                while (iterator3.hasNext()) {
+                    s = iterator3.next();
+                    if (s.equals(Days.SUNDAY)) {
+                        iterator3.remove();
+                    }
+                }
+                System.out.println(set2);
+            } catch (Exception e) {
+                System.out.println("Exception");
+            }
+
+            // AddAll
+            set1.addAll(set2);
+
+            System.out.println(set1);
+
+            System.out.println(" ");
+
+            // RetainAll
+            set2.retainAll(set1);
+            System.out.println(set2);
+
+            System.out.println(" ");
+
+            //Spliterator
+            Spliterator<Days> days = set2.spliterator();
+            days.forEachRemaining((n) -> System.out.println("Day:" + n));
+
+            System.out.println(" ");
+
+            // Contains
+            Boolean b  = set2.contains(Days.MONDAY);
+            System.out.println(b);
+
+            System.out.println(" ");
+
+            //Size
+            System.out.println(set2.size());
+
+            System.out.println(" ");
+
+            //IsEmpty
+            boolean c = set2.isEmpty();
+            System.out.println(c);
+
+            System.out.println(" ");
+
+
+            // java.util.AbstractCollection
+            //ContainsAll
+            Boolean d = set2.containsAll(set1);
+
+            System.out.println(d);
+
+            System.out.println(" ");
+
+            //toString
+            String s = set2.toString();
+            System.out.println(s);
+
+
+
+            // java.util.AbstractSet
+
+            //RemoveAll
+            EnumSet<Days> set5 = EnumSet.of(Days.WEDNESDAY, Days.MONDAY);
+
+            set2.removeAll(set5);
+            System.out.println(set2);
+            System.out.println(" ");
+
+            //Equals
+            Boolean e = set2.equals(set1);
+            System.out.println(e);
+
+            //HashCode
+            int f = set2.hashCode();
+            System.out.println(f);
+
+            // java.util.Collection
+            //RemoveIf
+            Predicate<Days> pr = a -> set2.contains(Days.FRIDAY);
+            set2.removeIf(pr);
+            System.out.println(set2);// Deletes upto Days.FRIDAY
+
+            
+            set1.removeIf(a -> (set1.contains(Days.TUESDAY)==true));
+            System.out.println(set1);//Deletes upto Days.TUESDAY
+
+            //Stream
+
+            System.out.println(" ");
+
+            set1.stream().forEach(System.out::println);
+            System.out.println(" ");
+        
+
+            //ParallelStream
+            set1.parallelStream().forEach(System.out::println);
+            System.out.println(" ");
+
+
+
+            // java.util.AbstractCollection
+            //toArray
+            System.out.println(" ");
+            Object[] arr = set1.toArray();
+            for (Object o : arr) {
+                System.out.println(o);
+            }
+
+
+
+
+        } catch (Exception e) {
+
+            System.out.println("Exception");
+        }
+
+    }
+}