Recursion(Java Language)

Write a program named NumberPermutation.java and implement a recursive method specified below:

public static void permutation(int num)

This method has a positive integer as its parameter and displays all permutations of the odd digits of that length.

Display these values in ascending order. For example, if the length is 3, your program should display:

111

113

115

117

119

131

133

135

...