原题：
我在thinking in java中看见以下一段代码。
//:Garbage.java
//Demonstration of the garbage
//collector and finalization
class Chair {
static boolean gcrun=false;
static boolean f=false;
static int created=0;
static int finalized=0;
int i;
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(
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