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for example, convert a String[][] {{"1","2"},{"3","4"},{"5","6"}} to a double[][] {{1.0,2.0},{3.0,4.0},{5.0,6.0}}. I tried:

Arrays.stream(strArr).map(s ->
            Arrays.stream(s).mapToDouble(Double::parseDouble).toArray()).toArray();

but it doesn't work.

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    What do you mean by "it doesn't work"? Is there an error message? Commented Aug 5, 2021 at 4:13

1 Answer 1

Reset to default
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To create double[][], you need to use

double[][] result = Arrays.stream(input).map(s -> Arrays.stream(s).mapToDouble(Double::parseDouble).toArray()).toArray(double[][]::new);
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