Check if All A's Appears Before All B's.java

class Solution {
    public boolean checkString(String s) {
        for(int i = 0; i < s.length(); i++){
            if(s.charAt(i) == 'b'){
                for(int j = i+1; j < s.length(); j++){
                    if(s.charAt(j) == 'a'){
                        return false;
                    }
                }
            }
        }
        return true;
    }
}