How to find the count of substring in java

Question

I am trying to find the count of the substring in a big string of length 10000 characters. Finally I need to remove all the substring in it. example s = abacacac, subs

Answer 1

For countung the substrings I would use indexOf:

int count = 0;
for (int pos = s.indexOf(substr); pos >= 0; pos = s.indexOf(substr, pos + 1))
    count++;