java二维数组矩阵相加

以下是Java中实现二维数组矩阵相加的代码：

public class MatrixAddition {
    public static double[][] addMatrix(double[][] a, double[][] b) {
        int rows = a.length;
        int columns = a[0].length;
        double[][] result = new double[rows][columns];
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < columns; j++) {
                result[i][j] = a[i][j] + b[i][j];
            }
        }
        return result;
    }

    public static void printMatrix(double[][] matrix) {
        for (double[] row : matrix) {
            for (double element : row) {
                System.out.print(element + " ");
            }
            System.out.println();
        }
    }

    public static void main(String[] args) {
        double[][] a = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
        double[][] b = {{0, 2, 4}, {1.1, 4.3, 5.2}, {1, 4.5, 2.2}};
        double[][] result = addMatrix(a, b);
        printMatrix(result);
    }
}

输出结果为：

1.0 4.0 7.0 
5.1 9.3 11.2 
8.0 12.5 11.2