Is Subsequence

class Solution {
    public boolean isSubsequence(String s, String t) {
        if(s.length() == 0 && t.length() == 0){
            return true;
        }
        else if(s.length() == 0){
            return true;
        }
        else if(t.length() == 0){
            return false;
        }
        int l = 0; 
        int count = 0;
        for(int i = 0; i<t.length(); i++){
            if(t.charAt(i) == s.charAt(l)){
                count++;
                l++;
            }
            if(count == s.length()){
                return true;
            }
        }
        return false;
    }
}