Write a Java program to count the number of occurences of each letter in a string. The program displays the letters in ascending order. Provide two methods. Each method that has an argument of map collection. The data is read from a file.

Sample output:

Enter a string:

Map contains:

Sort by keys Key Value c 3 e 3 l 1 m 1 o 2 s 1 t 1 w 1

Sort by values Key Value c 3 e 3 o 2 l 1 m 1 s 1 t 1 w 1