Sum of elements of an Integer ArrayList without looping

I have gone through a few web resources and links, however, I am unable to find the sum of elements of an Integer ArrayList without looping. I am looking for a function which will allow me to do this in a single line.

I was able to find the same for a normal array as follows

import java.util.ArrayList;
import java.util.stream.IntStream;

public class sumArray
{
    public static void main(String[] args)
    {
        int[] a = {10,20,30,40,50};
        int sum = IntStream.of(a).sum();
        System.out.println("The sum is " + sum);
    }
}

I can write a user-defined function as follows

import java.util.ArrayList;

public class sumAL
{
    public static void main(String[] args)
    {
        ArrayList<Integer> al = new ArrayList<Integer>();
        al.add(1);
        al.add(3);
        al.add(5);

        System.out.println(sum(al));
    }

    static int sum(ArrayList<Integer> al)
    {
        int value = 0;
        for(int i : al)
        {
            value += i;
        }
        return value;
    }
}

However, I'm looking for something in-built. Please advise.

EDIT : I have tried the following but I get build errors

import java.util.ArrayList;

public class sumAL
{
    public static void main(String[] args)
    {
        System.out.println(getVersion());

        ArrayList<Integer> al = new ArrayList<Integer>();
        al.add(1);
        al.add(3);
        al.add(5);
        System.out.println(al.stream().mapToInt(Integer::intValue).sum());
    }

    static double getVersion () {
        String version = System.getProperty("java.version");
        int pos = version.indexOf('.');
        pos = version.indexOf('.', pos+1);
        return Double.parseDouble (version.substring (0, pos));
    }
}

Errors

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
    Integer cannot be resolved to a variable
    Syntax error on tokens, delete these tokens