Method isSame

ValidParenthesis.java:17–26

(char str, char stk)

    }
    
    public boolean isSame(char str, char stk)
    {
        if(isOpen(stk))
        {
            if(str=='}' && stk=='{') return true;
            else if(str==')' && stk=='(') return true;
            else if(str==']' && stk=='[') return true;
        }
        return false;
    }
    
    public boolean isValid(String s) {