/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6);
		int[] sum = new int[]{0};
		numbers.forEach((x) -> sum[0] += x);
		System.out.println(sum[0]);
	}
}

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