I am having trouble with this programming exercise, please help. I need to use printf method and needs to be in java

Programming Exercise 8.5 (Algebra: add two matrices) Write a method to add two matrices. The header of the method is as follows: public static double[][] addMatrix(double[][] a, double[][] b In order to be added, the two matrices must have the same dimensions and the same or compatible types of elements. Let c be the resulting matrix. Each element cij is aij +bij. For example, for two 33 matrices a and b,c is a11a21a31a12a22a32a13a23a33+b11b21b31b12b22b32b13b23b33=a11+b11a21+b21a31+b31a12+b12a22+b22a32+b32a13+b13a23+b23a33+b33 Write a test program that prompts the user to enter two 33 matrices and displays their sum. Here is a sample run