Java Challenge - countXX - warm_up_2

Count the number of "xx" in the given string. We'll say that overlapping is allowed, so "xxx" contains 2 "xx".

countXX("abcxx") → 1
countXX("xxx") → 2
countXX("xxxx") → 3

Solution :

1 2 3 4 5 6 7

int countXX(String str) { int count = 0; for (int i = 0; i < str.length()-1; i++) { if (str.substring(i, i+2).equals("xx")) count++; } return count; }