Can I have an empty Java class?

Question

I\'m creating a grid based game.

I need to implement a set of obstacles that take random positions within the grid. I\'ve created an abstract class ALifeForm

Answer 1

Well to do it you don't need to have an abstract class and a class that extends it, or an empty class(wich is possible too).

First way:

You just need to implement two classes: The class that contains the methods and the variables you need to use and the second calss that has an instance of your first class:

public class A{
  public void firstMethod(){
    //do your stuff here
  }
....
}

public class B{
  public static void main(String[] args) {
   A a=new A(); //instantiate your class here 
   a.firstMethod();// then just use its methods
  }
}

Because if you implement a class that extends an abstract class it should implement all its methods.

Second way:

• Or if you want your second class to be specialized you could have :

your first class wich should not be abstract and the second one can extend it and use all its methods, and have its specific methods