Data structures and introduction to algorithm

College of Engineering Department of Communications and Computer Engineering Data Structures and Introduction to Algorithm (Java) HashSets and HashMaps (Project 6) Write a program that reads a Java source code file and outputs a list of all identifiers (that is, variable names but not keywords, not found in comments or string constants) in alphabetical order. Each identifier should be output with a list of line numbers on which it occurs. Notice that your code should make use of hashing. Input sample 2 public class ProjectSExample f 3 private int x;//x is a private variable private int ase; public ProjectSExample/x is used here System.out printin(x+a): 6 2 9 1e 11 public static void main(Stringl] args) f 12 13 1000 Auto generated method stub 14 15 Output: (args): (11 (x): 13, 6. 6.6,7