Answer an array?/java

Write a method called stdev that returns the standard deviation of an array of integers. Standard deviation computed by taking the square root of the sum of the squares of the differences between each element andof the mean, divided by one less than the number of elements. (It's just that simple!) More concisely and mathematically, the standard deviation of an array a is written as follows: For example, if the array passed contains the values 11, -2, 4, -4, 9, -6, 16, -8, 25, -10),your method should return approximately 11.237