» » » Java 8 initialize set with values with an example program

  • We can initialize set while defining by passing values to constructor.
  • For example to initialize HashSet we can use Arrays.asList(value1,value2).
  • Set<Integer> hashset = new HashSet<>(Arrays.asList(12, 13));

#1: Java Example program to initialize set without using java 8

  1. import java.util.Arrays;
  2. import java.util.HashSet;
  3. import java.util.Set;
  4. /**
  5.  * @author www.Instanceofjava.com
  6.  * @category interview questions
  7.  * 
  8.  * Description: Initialize set 
  9.  *
  10.  */
  11. public class InitializeSet {

  12. public static void main(String[] args) {

  13. Set<Integer> hashset = new HashSet<>(Arrays.asList(12, 13));
  14. System.out.println(hashset);
  15. }

  16. }

Output:

  1. [12, 13]


  • We can initialize set in java 8 using Stream.
  • Stream.of("initialize", "set").collect(Collectors.toSet());



#2: Java Example program to initialize set without using java 8

  1. import java.util.Set;
  2. import java.util.stream.Collectors;
  3. import java.util.stream.Stream;
  4. /**
  5.  * @author www.Instanceofjava.com
  6.  * @category interview questions
  7.  * 
  8.  * Description: Initialize set using java 8 Stream
  9.  *
  10.  */
  11. public class InitializeSet {

  12. public static void main(String[] args) {

  13. Set<String> set = Stream.of("initialize", "set").collect(Collectors.toSet());
  14. System.out.println(set);
  15. }

  16. }



Output:

  1. [set, initialize]


  • We can initialize Set in java 8 by creating stream from an Array and list


#3: Java Example program to initialize set without using java 8


java 8 initialize set with values with an example program

Instance Of Java

We will help you in learning.Please leave your comments and suggestions in comment section. if you any doubts please use search box provided right side. Search there for answers thank you.
«
Next
Newer Post
»
Previous
Older Post

No comments

Leave a Reply

Select Menu