IN JAVA

Write the method all End()
 *
 * Your method will take an array of int of ODD length.
 * You should replace the first and middle elements with
 * the last, so that [1, 2, 3] becomes [3, 3, 3].
 * Return the modified parameter.
 * The array will have a length of at least 1
 * and the length will be ODD.
 *
 * Some examples:
 * all End([1, 2, 3]) -> [3, 3, 3]
 * all End([1, 2, 3, 4, 5]) -> [5, 2, 5, 4, 5]
 * all End([7]) -> [7]
 *
 * @param nums an array of int (length will be at least 1)
 * @return the modified array