Count Occurrences|Frequency of a Number in a Sorted Array

Given a sorted array and a number k, write a code to count
the number of occurrences of a number k in a sorted array.

For Example:

arr : { 1, 4, 7, 8, 8, 11, 11, 11, 11, 12, 13 }, k = 11

Number of occurrence: 4

Count Occurrences of a Number in a Sorted Array,Count Frequency of a Number in a Sorted Array,Java,Programming Tutorials,