What do y'all think about it? Can you do better? Method to count the number of xs in a string (can work with any other strings)

Question

int countXX(String str) {
if(str.length()<=0)return 0;
char[]count=str.toCharArray();
int index=0;
for(int i=0;i<count.length;i++) {
if(count[i]=='x') {
index++;}
}
if(index==0)return 0;
return index;
}

Answer 1

Could be simplified to:
int countXX(String str) {
int index=0;
for(int i=0;i<str.length();i++)
if(str.charAt(i)=='x')
index++;
return index;
}

Answer 2

John Wells cool thanks a lot !