Chair() {

　　i = ++created;

　　if(created == 47)

　　System.out.println("Created 47");

　　}

　　protected void finalize() {

　　if(!gcrun) {

　　gcrun = true;

　　System.out.println("Beginning to finalize after " + created + " Chairs have been created");

　　}

　　if(i == 47) {

　　System.out.println("Finalizing Chair #47， " +"Setting flag to stop Chair creation");

　　f = true;

　　}

　　finalized++;

　　if(finalized >= created)

　　System.out.println("All " + finalized + " finalized");

　　}

　　}

　　public class Garbage {

　　public static void main(String[] args) {

　　if(args.length == 0) {

　　System.err.println("Usage: \n" + "java Garbage before\n or:\n" + "java Garbage after");

　　return;

　　}

　　while(!Chair.f) {

　　new Chair();

　　new String("To take up space");

　　}

　　System.out.println("After all Chairs have been created:\n" + "total created = " + Chair.created +

　　"， total finalized = " + Chair.finalized);

　　if(args[0].equals("before")) {

　　System.out.println("gc():");

　　System.gc();

　　System.out.println("runFinalization():");

　　System.runFinalization();

　　}