java 8 sum all values of two int arrays with each other – stackoverflow.com

int[] ar1 = {1,2,3}; int[] ar2 = {1,2,3}; Output: {2,3,4,3,4,5,4,5,6} I tried something like this: IntStream.range(0,ar1.length).map(x -> IntStream.range(0,ar2.length).map(y -> ...

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