Write a program that reads a Java program from a text file and performs the following tasks. a. Display a list in alphabetical order of the unique Java keywords used in the program.  b. Repeat Part a,...

Write a program that reads a Java program from a text file and performs the following tasks.

a. Display a list in alphabetical order of the unique Java keywords used in the program.

 b. Repeat Part a, but add the number of times each keyword occurs in the program.

 c. Repeat either Part a or Part b, but add the line number of each line that contains the keyword.