Garbage Collector Java

public class Pisang {

    /**
     * @param args the command line arguments
     */

    public void finalize() {
System.out.println("Garbage Collector Berhasil Terkumpul");
}
    //Akan ditampilkan jika Garbage Collector bekerja

    public static void main(String[] okedroid) {


 /*1*/Pisang satu = new Pisang();
/*2*/Pisang dua = new Pisang();
/*3*/Pisang tiga = satu;
/*4*/satu = null;
/*5*/dua = null;
/*6*/System.gc();
System.out.println("Gargabe Collector Siap !");

    }

}