Module# 10: Set Lecture#40: Set Collection in Java

// Example 40.1: Creating a set with a collection of enumerated object

/* The following program illustrates the usage of a few basic methods of EnumSet.*/

import java.util.EnumSet;

enum Color {RED, BLUE, GREEN, BLACK, WHITE, VIOLET, ORANGE, INDIGO};

public class EnumSetDemo{

public static void main(String[] args) {

// Creating a set

EnumSet<Color> set1, set2, set3, set4, set5, set6;

// Adding elements

set1 = EnumSet.of(Color.RED, Color.BLUE, Color.GREEN);

set2 = EnumSet.complementOf(set1);

set3 = EnumSet.allOf(Color.class);

set4 = EnumSet.range(Color.BLACK, Color.VIOLET);

set5 = EnumSet.copyOf(set2);

set6 = EnumSet.noneOf(set1);

System.out.println("Set 1: "+ set1);

System.out.println("Set 2: "+ set2);

System.out.println("Set 3: "+ set3);

System.out.println("Set 4: "+ set4);

System.out.println("Set4 contains RED? " + set4.contains(Color.RED);

// Traversing elements

Set5.forEach(System.out::println);

//System.out.println("Set 5: "+ set5);

Iterator<Color>iter = set6.iterator();

while (iter.hasNext())

System.out.println(iter.next());

}

}