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  1. import java.util.stream.*;
  2. import java.util.*;
  3. public class Main {
  4.     public static void main(String[] args) {
  5.         ArrayList<ArrayList<Integer>> outerNums = new ArrayList<ArrayList<Integer>>();
  6.         ArrayList<Integer> innerNums0 = new ArrayList<>();
  7.         ArrayList<Integer> innerNums1 = new ArrayList<>();
  8.         ArrayList<Integer> innerNums2 = new ArrayList<>();
  9.         ArrayList<Integer> innerNums3 = new ArrayList<>();
  10.         innerNums0.add(-1);
  11.         innerNums0.add(-4);
  12.         innerNums1.add(3);
  13.         innerNums1.add(2);
  14.         innerNums2.add(0);
  15.         innerNums2.add(-4);
  16.         innerNums3.add(-3);
  17.         innerNums3.add(2);
  18.         outerNums.add(innerNums0);
  19.         outerNums.add(innerNums1);
  20.         outerNums.add(innerNums2);
  21.         outerNums.add(innerNums3);
  22.         System.out.println(Arrays.toString(res(outerNums)));
  23.     }
  24.     public static int[] res(ArrayList<ArrayList<Integer>> innerNums) {
  25.         System.out.println(innerNums);
  26.         int[] result = innerNums.stream().mapToInt(x -> x.stream().mapToInt(i -> i).sum()).toArray();
  27.         return result;
  28.     }
  29. }
Success #stdin #stdout 0.09s 48404KB
comments (?)
stdin 
Standard input is empty
stdout 
[[-1, -4], [3, 2], [0, -4], [-3, 2]]
[-5, 5, -4, -1]
https://ideone.com/xrVgYn
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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