how to count the exact number of words in a string that has empty spaces between words?

Question

Write a method called wordCount that accepts a String as its parameter and returns the number of words in the String. A word is a sequence of one or more nonspace characters

Answer 1

Simply use s.split(" ").length and for wide spaces...use s.trim().replaceAll("\\s+"," ").split(" ").length

Answer 2

It should be easy with:

String[] arr = "how are you sir".split("\\s");
System.out.printf("Count [%d]%n", arr.length);

Answer 3

If you want to ignore leading, trailing and duplicate spaces you can use

String trimmed = text.trim();
int words = trimmed.isEmpty() ? 0 : trimmed.split("\\s+").length;

Answer 4

public static int wordCount(String s){
    if (s == null)
       return 0;
    return s.trim().split("\\s+").length;
}

Have fun with the function.

Answer 5

Added some lines to your code:

public static int wordCount(String s){
    int counter=0;
    for(int i=0;i<=s.length()-1;i++){
            if(Character.isLetter(s.charAt(i))){
                    counter++;
                    for(;i<=s.length()-1;i++){
                            if(s.charAt(i)==' '){
                                    counter++;
                                    i++;
                                    while (s.charAt(i)==' ')
                                        i++;
                                    }
                            }

                    }


            }
            return counter;
   }

Answer 6

String str="I am a good boy";
String[] words=str.split("\\s+");
System.out.println(words.length);