Array of function pointers in Java [duplicate]

Answer 1

You can achieve the same result with the functor pattern. For instance, having an abstract class:

abstract class Functor
{
  public abstract void execute();
}

Your "functions" would be in fact the execute method in the derived classes. Then you create an array of functors and populate it with the apropriated derived classes:

class DoSomething extends Functor
{
  public void execute()
  {
    System.out.println("blah blah blah");
  }
}

Functor [] myArray = new Functor[10];
myArray[5] = new DoSomething();

And then you can invoke:

myArray[5].execute();