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From: Lino Ferrentino <lino.ferrentino@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: simple method to simulate function pointers in java
Date: Fri, 2 Sep 2011 01:54:45 -0700 (PDT)
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Maybe there are other methods... I use this:

public final class b_callbacks {

    private b_callbacks(){
    }


    public static interface void_f_void{
	public void f();
    }

    public static interface void_f_int{
	public void f(int i);
    }


}

----

when I want to use a function pointer

import b_callbacks.void_f_int;

private void_f_int my_callback;

my_callback = new void_f_int(){
 public void f(int i){
   //code
 }
};

to call the callback

my_callback.f(42);


====

For each function pointer type we create an interface.