How do I count the number of words in a string?

Question

I need to count the number of words and I am assuming the correct way to do it is by calculating the number of times that the previous character in a string is not a letter

Answer 1

Addressing the code directly, your first loop has i=0 as the first value of i, but then you ask for

string.charAt(i-1) = string.charAt(-1),

which is where your array-out-of-bounds is coming from.

The second loop has another problem:

for(int j = 0; i < alphabets.length(); j++) {

You may also want to consider apostrophes as parts of words as well.