Java program to count the total words in the given string

In this article, we will discuss the concept of Java program to count the total words in the given string

In this post, we are going to learn how to count the total number of words in the given string in Java programming language

Java program to count the total number of words in the given string — Count words of the string

Java program to count the total words in the given string

Program to count the total words using for loop

The program allows the user to enter a string thereafter It counts the total number of words of the given string using for loop in Java language

Program 1

import java.util.Scanner;
public class CountWordsOfString{
public static void main(String args[]){
    String str;
char ch; //variable declaration
int count=0;//word counter 

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the String to count words  ");
str=scan.nextLine();
for(int i=0; i<str.length(); i++){
    ch=str.charAt(i);
    if (ch==' ')
        count++;//word counter incremented by 1
}
count=count+1;
System.out.println("Total number of words: "+count);
}
}

When the above code is executed it produces the following result

Enter the String to count words
Java is the best language for programmers
Total number of words: 7

Approach

Declare two variable(String and character) as String str, char ch;
Declare and initialize an integer variable as int count=0;
The user is asked to enter a string to count words
A for-loop is used to count total words of the given string using the count variable
It is initialized as i=0, checks the condition whether i<str.length(); and executes the loop until the given condition becomes true
Use an if condition to test if(ch==’ ‘), if it is true, count becomes count + 1(count=count+1)
Finally, the program displays the total number of the words using the count variable

Program to count the total words using while loop

The program allows the user to enter a string thereafter It counts the words of the string using while loop in Java language

Program 2

import java.util.Scanner;
public class CountWordsOfString1{
public static void main(String args[]){
    String str;
char ch; //variable declaration
int count=0;//word counter

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the String for count words  ");
str=scan.nextLine();
int i=0; 
while(i<str.length()){
    ch=str.charAt(i);
    if (ch==' ')
        count++;//word counter incremented by 1
     i++;//i icremented by 1 
}
count=count+1;
System.out.println("Total number of words: "+count);
}
}

When the above code is executed it produces the following result

Enter the String for count words
Java and c++ are OOP language
Total number of words: 6

Approach

Declare two variable(String and character) as String str, char ch;
Declare and initialize an integer variable as int count=0;
The user is asked to enter a string to count words
Declare and initialize an integer variable as int i=0;
A while-loop is used to count total words of the given string using the count variable
It checks the condition whether i<str.length(), and executes the loop until the given condition becomes true
Use an if condition to test if(ch==’ ‘), if it is true, count becomes count + 1(count=count+1)
i is incremented by 1(i=i+1)
Finally, the program displays the total number of the words using the count variable

Program to count the total words using do-while loop

The program allows the user to enter a string and thereafter It counts the words of the string using do-while loop in Java language

Program 2

import java.util.Scanner;
public class CountWordsOfString2{
public static void main(String args[]){
    String str;
char ch; //variable declaration
int count=0;//word counter

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the String for count words  ");
str=scan.nextLine();
int i=0; 
do{
    ch=str.charAt(i);
    if (ch==' ')
        count++;//word counter incremented by 1
     i++;
}while(i<str.length());
count=count+1;
System.out.println("Total number of words: "+count);
}
}

When the above code is executed it produces the following result

Enter the String for count words
Java is fully OOP language
Total number of words: 5

Approach

Declare two variable(String and character) as String str, char ch;
Declare and initialize an integer variable as int count=0;
The user is asked to enter a string to count words
Declare and initialize an integer variable as int i=0;
A do-wile loop is used to count total words of the given string using the count variable
It checks the condition whether i<str.length(), and executes the loop until the given condition becomes true
Use an if condition to test if(ch==’ ‘), if it is true, count becomes count + 1(count=count+1)
i is incremented by 1(i=i+1)
Finally, the program displays the total number of the words using the count variable