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Arrange Words Alphabetically Program - Java Program

Write a program to accept a sentence as input. The words in the string are to be separated by a blank. Each word must be in uppercase. The sentence is terminated by either ‘.’, ‘!’ or ‘?’. Perform the following tasks:

Obtain the length of the sentence (measured in words).
Arrange the sentence in alphabetical order of the words.

Test your program with the sample data and some random data.

Example 1:
INPUT:
NECESSITY IS THE MOTHER OF INVENTION.
OUTPUT:
LENGTH: 6
REARRANGED SENTENCE:
INVENTION IS MOTHER NECESSITY OF THE

Example 2:
INPUT:
BE GOOD TO OTHERS.
OUTPUT:
LENGTH: 4
REARRANGED SENTENCE:
BE GOOD OTHERS TO

Java


import java.io.*;
import java.util.StringTokenizer;
class Alphabetical{
    public static void main(String args[])throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.print("Sentence: ");
        String s = br.readLine();
        s = s.trim();
        char last = s.charAt(s.length() - 1);
        if(last != \'.\' && last != \'?\' && last != \'!\'){
            System.out.println("INVALID SENTENCE!");
            return;
        }

        s = s.toUpperCase();
        StringTokenizer st = new StringTokenizer(s, " .?!,");
        int len = st.countTokens();
        System.out.println("LENGTH: " + len);
        String words[] = new String[len];
        for(int i = 0; i < len; i++)
            words[i] = st.nextToken();
        for(int i = 0; i < len; i++){
            for(int j = 0; j < len - 1 - i; j++){
                if(words[j].compareTo(words[j + 1]) > 0){
                    String temp = words[j];
                    words[j] = words[j + 1];
                    words[j + 1] = temp;
                }
            }
        }

        String r = "";
        for(int i = 0; i < len; i++)
            r += words[i] + " ";
        r = r.trim();
        System.out.println("REARRANGED SENTENCE:\n" + r);
    }
}

Output

 
OUTPUT 1:
Sentence: NECESSITY IS THE MOTHER OF INVENTION.
LENGTH: 6
REARRANGED SENTENCE:
INVENTION IS MOTHER NECESSITY OF THE

OUTPUT 2:
Sentence: BE GOOD TO OTHERS.
LENGTH: 4
REARRANGED SENTENCE:
BE GOOD OTHERS TO