word count algorithm java code example

Example 1: count the number of words in a string java

public static void main(String[] args)
    { 
        //return the number of words in a string 
        
       String example = "This is a good exercise"; 
       
       int length = example.split(" ").length;
       
       System.out.println("The string is " + length + " words long.");
        
        
    }

Example 2: count word in string no matter the delimiter java

public static void main(String[] args)
    { 
        //Scanner object instantiation 
        Scanner dude = new Scanner(System.in); 
       
       //variable declaration 
       String string1 = ""; 
       int count = 0; 
       boolean isWord = false; 
       
       
       //user prompt and input 
       System.out.println("Enter in your string"); 
       string1 = dude.nextLine(); 
       
       int endOfLine = string1.length()-1; 
       char ch [] = string1.toCharArray(); 
       
       for (int i = 0; i < string1.length(); i++)
       { 
           if(Character.isLetter(ch[i]) && i != endOfLine)
           {//if character is letter and not end of line
               isWord = true; //it is part of a word 
           }  
           if (!Character.isLetter(ch[i]) && isWord)
           { //if character is not a letter, and previous 
             //character is a letter i.e. non-letter is 
             //preceded by character 
              count++; //add to word count 
              isWord = false; //get ready to detect new word  
           }
           if (Character.isLetter(ch[i]) && i == endOfLine)
           { //if character is letter 
             //and at end of line 
               count++; //add to word count 
               isWord = false; 
           }
           
       } 
       System.out.println("There are " +count+ " words");     
    }