Java-Collection-Framework-and-Java-Set/HashSetDemo15a.java at main · AvinandanBose/Java-Collection-Framework-and-Java-Set · GitHub

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import java.util.HashSet;

public class HashSetDemo15a {

public static void main(String[] args) {

HashSet<String> set1 = new HashSet<>();

HashSet<Integer> set2 = new HashSet<>();

set1.add("A");

set1.add("a");

set1.add("B");

set1.add("b");

set1.add("C");

set1.add("c");

set2.add(1);

set2.add(2);

set2.add(3);

set2.add(4);

set2.add(5);

set2.add(6);

set1.stream().flatMapToDouble(s -> s.chars().mapToDouble(c -> c)).forEach(c -> System.out.println(c));

set1.stream().flatMapToInt(s -> s.chars()).forEach(c -> System.out.println(c));

set2.stream().flatMapToInt(s -> s.toString().chars()).forEach(c -> System.out.println(c));

set1.stream().flatMapToLong(s -> s.chars().mapToLong(c->c)).forEach(c -> System.out.println(c));

set2.stream().flatMapToLong(s -> s.toString().chars().mapToLong(c -> c)).forEach(c -> System.out.println(c));

}

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