/*
 *  развитие примера От: 	MAPCUAHUH  Дата: 	26.03.07 20:02  http://rsdn.ru/forum/java/2420033.flat
 */
class F1 implements MyFuncPtr {
	public int doInit(int a) {
		return a + 1;
	}
	public void init(){
		Propi propi = new Propi();
		propi.init(this, 1);		
	}
}

class F2 implements MyFuncPtr {
	public int doInit(int a) {
		return a - 1;
	}
	public void init(){
		Propi propi = new Propi();
		propi.init(this, 1);		
	}	
}

public class Main {
	
	public static void main(String[] args) {
		System.out.println("start -----");
		
		F1 f1 = new F1();
		f1.init();
		
		F2 f2 = new F2();
		f2.init();
		
		System.out.println("===== finis");
	}
}

interface MyFuncPtr {
	int doInit(int a);
}

public class Propi {
	public void init(MyFuncPtr f, int arg) {
		System.out.println("\ndo something ...");
		System.out.println(f.doInit(arg));
	}
}

start ---

do something ...
2

do something ...
0
finis ===