[Java] Syntax error on token "class", @ expected"

class SingletonTest(){
    public static void main(String[] args){
        Singleton s = Singleton.getInsance();
    }
}

// SingletonTest() <- This one is the problem. You have to delete "()".

->

class SingletonTest{
    public static void main(String[] args){
        Singleton s = Singleton.getInsance();
    }
}

//correct version