Java Program to Count Total Words in a String

Write a Java Program to Count Total Words in a String with an example. In this count number of words in a string example, we first used for loop to iterate strTWords. Inside the loop, to keep the code simple, we assigned (TWord_ch = strTWords.charAt(i)) each character to TWord_ch. Next, we used the If statement. 

Within the first if condition (TWord_ch == ‘ ‘ )|| TWord_ch == ‘\t’), we check whether the character is empty or tab space. If true, we increment the totalWords value. Next, we print the totalWords as the result.

import java.util.Scanner;

public class CountTotalStrWords1 {
	private static Scanner sc;
	public static void main(String[] args) {
		String strTWords;
		int i, totalWords;
		totalWords = 1;
		char TWord_ch;
		
		sc= new Scanner(System.in);

		System.out.print("\nPlease Enter String to Count Words =  ");
		strTWords = sc.nextLine();
		
		for(i = 0; i < strTWords.length(); i++)
		{
			TWord_ch = strTWords.charAt(i);
			if((TWord_ch == ' ' ) || TWord_ch == '\t') {
				totalWords++;
			}
		}		
		System.out.println("\nTotal Number of Words  =  " + totalWords);
	}
}

Java Program to Count Total Words in a String

In this Java program, first, check whether the given string is empty. If not, we used the split function to split strTWords and assigned them to a string array. Later, we print the length of a string array.

import java.util.Scanner;

public class CountTotalStrWords2 {
	private static Scanner sc;
	public static void main(String[] args) {
		String strTWords;
		
		sc= new Scanner(System.in);

		System.out.print("\nPlease Enter String to Count Words =  ");
		strTWords = sc.nextLine();
		
		if(strTWords == null || strTWords.isEmpty()) {
			System.out.println("\nPlease enter the Non-Empty String");

		}
		else {
			String[] words = strTWords.split("\\s+");
			System.out.println("\nTotal Number of Words =  " + words.length);
		}
	}
}

Please Enter String to Count Words =  learn java programming

Total Number of Words =  3

Java Program to Count Total Words in a String using StringTokenizer

import java.util.Scanner;
import java.util.StringTokenizer;

public class CountTotalStrWords3 {
	private static Scanner sc;
	public static void main(String[] args) {
		String strTWords;
		
		sc= new Scanner(System.in);

		System.out.print("\nPlease Enter String to Count Words =  ");
		strTWords = sc.nextLine();
		
		if(strTWords == null || strTWords.isEmpty()) {
			System.out.println("\nPlease enter the Non-Empty String");

		}
		else {
			StringTokenizer tk = new StringTokenizer(strTWords);
			System.out.println("\nTotal Number of Words  =  " + tk.countTokens());
		}
	}
}

Please Enter String to Count Words =  abc working at abc company

Total Number of Words  =  5

Java Program to Count Total Words in a String using functions

This Program to Count the number of Words in a String is the same as the above. Here, we separated the string word count logic using Java functions.

import java.util.Scanner;

public class CountTotalStrWords4 {
	private static Scanner sc;
	public static void main(String[] args) {
		String strTWords;
		int totalWords;
		
		sc= new Scanner(System.in);

		System.out.print("\nPlease Enter String to Count Words =  ");
		strTWords = sc.nextLine();
		
		totalWords = 	CountTotalWords (strTWords);	
		System.out.println("\nTotal Number of Words  =  " + totalWords);
	}
	public static int CountTotalWords (String strTWords) {
		int i, totalWords;
		totalWords = 1;
		
		for(i = 0; i < strTWords.length(); i++)
		{
			if((strTWords.charAt(i) == ' '  && strTWords.charAt(i - 1) != ' ')
					|| strTWords.charAt(i) == '\t') 
			{
				totalWords++;
			}
		}
		return totalWords;
	}
}

Please Enter String to Count Words =  learn java programming at tutorial gateway

Total Number of Words  =  6