How do I count the parentheses in a string?

Question

This is my method to count the number of parentheses in a string.

public int checkParenthesis(String print, char par){
    int num = 0;
    for(int i = 0; i<print.length(); i++){
        if(print.indexOf(i) == par){
            num++;
        }
    }
    return num;
}

It doesn't work. It returns 0. print is a random string and par is a parenthesis.

Answer 1

You need to use .charAt to get the current character and compare it with par:

if(print.charAt(i) == par)

Another way to do this:

for(char c : print.toCharArray()) {
  if(c == par) {
    num++;
  }
}