w3resource

Java: Count all words in a string

Java Method: Exercise-5 with Solution

Write a Java method to count all the words in a string.

Test Data:
Input the string: The quick brown fox jumps over the lazy dog.

Pictorial Presentation:

Java Method Exercises: Count all vowels in a string

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise5 {

  public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        System.out.print("Input the string: ");
        String str = in.nextLine();

        System.out.print("Number of words in the string: " + count_Words(str)+"\n");
    }

 public static int count_Words(String str)
    {
       int count = 0;
        if (!(" ".equals(str.substring(0, 1))) || !(" ".equals(str.substring(str.length() - 1))))
        {
            for (int i = 0; i < str.length(); i++)
            {
                if (str.charAt(i) == ' ')
                {
                    count++;
                }
            }
            count = count + 1; 
        }
        return count; // returns 0 if string starts or ends with space " ".
    }
 }

Sample Output:

Input the string: The quick brown fox jumps over the lazy dog                                                  
Number of words in the string: 9 

Flowchart:

Flowchart: Count all words in a string

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Java method to count all vowels in a string.
Next: Write a Java method to compute the sum of the digits in an integer.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.