Java word count program

Question

I am trying to make a program on word count which I have partially made and it is giving the correct result but the moment I enter space or more than one space in the string

Answer 1

try this

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class wordcount {
    public static void main(String[] args) {
        String s = "India is my country. I love India";
        List<String> qw = new ArrayList<String>();
        Map<String, Integer> mmm = new HashMap<String, Integer>();
        for (String sp : s.split(" ")) {
            qw.add(sp);
        }
        for (String num : qw) {
            mmm.put(num, Collections.frequency(qw, num));
        }
        System.out.println(mmm);

    }

}

Answer 2

Use split(regex) method. The result is an array of strings that was splited by regex.

String s = "Today is Holdiay Day";
System.out.println("Word count is = " + s.split(" ").length);

Answer 3

To count total words Or to count total words without repeat word count

public static void main(String[] args) {
    // TODO Auto-generated method stub
    String test = "I am trying to make make make";
    Pattern p = Pattern.compile("\\w+");
    Matcher m = p.matcher(test);
    HashSet<String> hs =  new HashSet<>();
    int i=0;
    while (m.find()) {
        i++;
        hs.add(m.group());
    }
    System.out.println("Total words Count==" + i);
    System.out.println("Count without Repetation ==" + hs.size());
}

}

Output :

Total words Count==7

Count without Repeatation ==5

Answer 4

    public class TotalWordsInSentence {
    public static void main(String[] args) {

        String str = "This is sample sentence";
        int NoOfWOrds = 1;

        for (int i = 0; i<str.length();i++){
            if ((str.charAt(i) == ' ') && (i!=0) && (str.charAt(i-1) != ' ')){
                NoOfWOrds++;
            }
        }
         System.out.println("Number of Words in Sentence: " + NoOfWOrds);
    }
}

In this code, There wont be any problem regarding white-space in it.
just the simple for loop. Hope this helps...

Answer 5

import com.google.common.base.Optional;
import com.google.common.base.Splitter;
import com.google.common.collect.HashMultiset;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Multiset;

String str="Simple Java Word Count count Count Program";
Iterable<String> words = Splitter.on(" ").trimResults().split(str);


//google word counter       
Multiset<String> wordsMultiset = HashMultiset.create();
for (String string : words) {   
    wordsMultiset.add(string.toLowerCase());
}

Set<String> result = wordsMultiset.elementSet();
for (String string : result) {
    System.out.println(string+" X "+wordsMultiset.count(string));
}

Answer 6

Not sure if there is a drawback, but this worked for me...

    Scanner input = new Scanner(System.in);
    String userInput = input.nextLine();
    String trimmed = userInput.trim();
    int count = 1;

    for (int i = 0; i < trimmed.length(); i++) {
      if ((trimmed.charAt(i) == ' ') && (trimmed.charAt(i-1) != ' ')) {
        count++;
      }
    }