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Bertha Mambala
arrays
1 Answer(s)      4 years and 10 months ago
Posted in : Java Beginners

write a program that reads in a text typed in by the user and produces a list of disinct words in alphabetical order and how many times each word appears in the passage.

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May 29, 2012 at 1:07 PM


The given code accepts the string text from the user and display distinct words in ascending order. The code also displays the frequency of each word.

import java.util.*;

public class CountWordOccurrence {


       public static void main(String[] args){

       Scanner input=new Scanner(System.in);
       System.out.print("Enter string: ");
       String str=input.nextLine();
        HashMap<String, Integer> map = new HashMap<String, Integer>();


         str = str.toLowerCase(); 
                int count = -1;
                for (int i = 0; i < str.length(); i++) { 
                   if ((!Character.isLetter(str.charAt(i))) || (i + 1 == str.length())) { 
                            if (i - count > 1) { 
                            if (Character.isLetter(str.charAt(i))) 
                                i++;
                            String word = str.substring(count + 1, i);
                            if (map.containsKey(word)) { 
                            map.put(word, map.get(word) + 1);
                            }
                            else{ 
                            map.put(word, 1);
                            } 
                        } 
                        count = i;
                    } 
                } 
        List sortedKeys=new ArrayList(map.keySet());
        Collections.sort(sortedKeys);
        System.out.println("List of words in ascending order: ");
        for(int i=0;i<sortedKeys.size();i++){
            System.out.println(sortedKeys.get(i).toString());
        }

        for(Map.Entry entry : map.entrySet()) {
            System.out.println(entry.getKey()+" : "+ entry.getValue());
        }
    } 
}









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