Why does the code work the same way? 
public static void main(String[] args) throws Throwable{

     for(int i = 1; i <= 50000; i++){

         Cat cat = new Cat();
         Dog dog = new Dog();

     }
}
and 
public static void main(String[] args) {

     for(int i = 1; i <= 50000; i++){

         Cat cat = new Cat();
         Dog dog = new Dog();

     }
}
Need or not 
throws Throwable