Re: garbage collecton
asit wrote:
Just look into the code snippet
class A{
static int ct;
A aob;
String name;
public A() {
ct++;
name = ct + "";
System.out.println("cretaed : " + name);
}
protected void finalize() {
System.out.println("freed : " + name);
}
public static void main(String args[]){
A a=new A();
A b=new A();
A c=new A();
a.aob=b;
b.aob=a;
c.aob=a.aob;
A d=new A().aob=new A();
The first object being created here is not the one being assigned to d.
Rather, the object referenced by the member named "aob" of this first
object is being assigned to d. Since the reference to this (first)
object is lost, it is eligible for garbage collection.
Also, if you look at the value of d while debugging, you can see that
"aob" of d is null, since it has not been assigned any value.
c=b;
The reference to the third object created is lost. So, this is another
object eligible for gc (the one you probably guessed correctly about).
c.aob=null;
System.gc();
The output I get from this line when I step over it is:
freed : 3
freed : 4
which indicates that the 3rd and 4th objects created are being freed.
}
}
The question was when the control reaches System.gc() line, how many
objects should be eligible for CG ??
My analysis shows it should be 1, but why the output indicates 2
objects ???
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