Java Program to count the words

The following code is to count the total words within a single string entered by the user.
Code:-

import java.util.*;
public class TotalWords {
    Scanner scan = new Scanner(System.in);
    String input;
    long length = 0, i = 0;
    public void input() {
        try {
            System.out.printf("Enter Text: ");
            input = scan.nextLine();
        } catch (InputMismatchException e) {
            System.err.println("Error Occur!\n" + e.getMessage());
            System.exit(0);
        }
    }
    public void compute() {
        try {
            Scanner s = new Scanner(input).useDelimiter("\\s* \\s*");
            System.out.println("Words:- ");
            while (s.hasNext()) {
                i++;
                System.out.println(i + ".) " + s.next());
                length++;
            }
            System.out.println("Number Of Words: " + length);
        } catch (NoSuchElementException | NullPointerException e) {
            System.err.println("Error Occur!\n" + e.getMessage());
            System.exit(0);
        }
    }
    public static void main(String[] args) {
        TotalWords TW = new TotalWords();
        TW.input();
        TW.compute();
    }
}
Output:-
Enter Text: Total      Number     Of   Words
Words:-
1.) Total
2.) Number
3.) Of
4.) Words
Number Of Words: 4