Display each word with no of letter in it (Program 4) by School

 import java.util.*;

public class Program_4 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter Sentence which end with ? . !");
        String sentence = in.nextLine();
        if (sentence.endsWith(".") || sentence.endsWith("!") || sentence.endsWith("?")) {
            sentence = sentence.substring(0, sentence.length() - 1);
            StringTokenizer st = new StringTokenizer(sentence);
            int length = 0;
            String word = "";

            while (st.hasMoreTokens()) {
                word = st.nextToken();
                length = word.length();
                System.out.println(word + "\t" + length);
            }
        } else {
            System.out.println("Invalid Input");
        }
    }
}