How to convert primitive double array to Double array

Question

With the Apache common math library I get back a primitive double array.

  RealMatrix pInverse = new LUDecomposition(p).getSolver().getInverse();

  double[][] temp = pInverse.getData();

I need to convert temp to a Double[][]

  Double[][] inverse = new Double[][]temp;

Answer 1

If you are using Java 8+ you can use :

Double[][] inverse = Arrays.stream(temp)
        .map(d -> Arrays.stream(d).boxed().toArray(Double[]::new))
        .toArray(Double[][]::new);