Regular Expression
We'll say that a "triple" in a string is a char appearing three times in a row. Return the number of triples in the given string. The triples may overlap.
countTriple("abcXXXabc") → 1
countTriple("xxxabyyyycd") → 3
countTriple("a") → 0
Solution:
public int countTriple(String str) {
int count = 0;
int i = 0;
int len = str.length();
while (i