Question

How to convert an ArrayList containing Integers to int array in Java

Answer 1

import java.util.ArrayList;
import java.util.List;

public class MyClass {
    public static void main(String args[]) {
        List<Integer> list = new ArrayList<>();
        
        list.add(43);
        list.add(90);
        list.add(7);
        list.add(937);

        int[] array = list.stream().mapToInt(i -> i).toArray();
   
        for (int n : array) {  
            System.out.println(n);  
        }  
    }
}
   
   
   
   
/*
run:
   
43
90
7
937
   
*/

 

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