Count words in a string method?

Question

I was wondering how I would write a method to count the number of words in a java string only by using string methods like charAt, length, or substring.

Loops and if statements are okay!

I really appreciate any help I can get! Thanks!

Answer 1

This would work even with multiple spaces and leading and/or trailing spaces and blank lines:

String trim = s.trim(); if (trim.isEmpty())     return 0; return trim.split("\\s+").length; // separate string around spaces 

Hope that helps. More info about split here.

Answer 2

public static int countWords(String s){      int wordCount = 0;      boolean word = false;     int endOfLine = s.length() - 1;      for (int i = 0; i < s.length(); i++) {         // if the char is a letter, word = true.         if (Character.isLetter(s.charAt(i)) && i != endOfLine) {             word = true;             // if char isn't a letter and there have been letters before,             // counter goes up.         } else if (!Character.isLetter(s.charAt(i)) && word) {             wordCount++;             word = false;             // last word of String; if it doesn't end with a non letter, it             // wouldn't count without this.         } else if (Character.isLetter(s.charAt(i)) && i == endOfLine) {             wordCount++;         }     }     return wordCount; }