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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");

}

}

}