java - 将多数组转换为单数组(java)

Question

是否可以将数据从multi[][]复制到single[]？!？

double multi[][] = { {1.0, 2.0}, {2.11, 204.00, 11.00, 34.00},{66.5,43.3,189.6}};

到

double single [] = {1.0, 2.0, 2.11, 204.00, 11.0, 66.5,43.3,189.6}

Answer 1

使用 Java 8，您可以编写:

double[] single = Arrays.stream(multi) //Creates a Stream<double[]>
            .flatMapToDouble(Arrays::stream) //merges the arrays into a DoubleStream
            .toArray(); //collects everything into a double[] array