Question

How to add HashSet as a static field in Java

Answer 1

package javaapplication1;

import java.util.HashSet;

public class JavaApplication1 {

    static HashSet<Integer> hash = new HashSet<>();

    static void addValue(int n) {
        hash.add(n);
    }
    
    static void addNumbers() {
        hash.add(6);
        hash.add(7);
        hash.add(8);
    }

    public static void main(String[] args) {

        try {

            hash.add(1);
            hash.add(2);
            hash.add(3);

            addValue(4);
            addValue(5);
            
            addNumbers();

            hash.stream().forEach((s) -> {
                System.out.println(s);
            });

        } catch (Exception e) {
            System.out.print(e.toString());
        }
    }
}

/*
             
run:

1
2
3
4
5
6
7
8
    
 */

 

70+ SQL courses for beginners and professionals