IN JAVA $*8\mathrm{.}2($Sum the major diagonal in a matrix$)$ Write a method that sums all the numbers

in the major diagonal in an $nn$ matrix of doub$7$e values using the following

header:

pub$1$ic static doub$1$e sumMajorDiagona$7($doub$1$e$[][]$ m$)$

Write a test program that reads a $4-$by$-4$ matrix and displays the sum of all its

elements on the major diagonal. Here is a sample run:$1234\mathrm{.}0--$Enter

$9101112$

$13141516$ ~Enter

Sum of the elements in the major diagonal is $34\mathrm{.}5$