The software I use is Eclipse, please TEACH me how to write it if possible, thanks.

2. Write a method that sums all the numbers in the major diagonal in an n n matrix of double values using the following header: public static double sumMajorDiagonal(doublellIl m) Write a test program that reads a 4-by-4 matrix and display the sum of all its elements on the major diagonal. Here is a sample run: Enter a 4-by-4 matrix row by row: 1 2 3 4.0 5 6.5 78 9 10 12 13 1415 16 Sum of the elements in the major diagonal is 34.5