Question

How to convert Set of Integers to Array of Integers in Java

Answer 1

import java.util.*; 
import java.util.stream.*; 

public class MyClass {
    public static void main(String args[]) {
        Set<Integer> set = new HashSet<>(Arrays.asList(1, 2, 3, 4, 5, 6)); 

        int[] arr = set.stream().mapToInt(Integer::intValue).toArray(); 

        System.out.println(Arrays.toString(arr));
    }
}


/*
run:

[1, 2, 3, 4, 5, 6]

*/

 

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