help on Garbage Collection analysis

[Ademola Okerinde]

please i need help on analysing garbage collection question like this:

how many objects are eligible for garbage collection after executing //line 12

class A{
A a;
public A(A a){
this.a=a;
}
public static void main(String args[]){
A a1=null;
A a2=new A(new A(null));
A a3=new A(a2);
a1=a3;
a1.a=new A(null);
a2.a=null; //Line12
System.gc();
}
}

[Ademola Okerinde]

Ademola Okerinde wrote:please i need help on analysing garbage collection question like this:

please And this 2nd one

how many objects are eligible for gabage collection after executing c.aob = null;

class A{
A aob;
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();
c=b;
c.aob=null;
System.gc();
}
}




-----------------------------------------------------------------------------------------------------
how many objects are eligible for garbage collection after executing //line 12

class A{
A a;
public A(A a){
this.a=a;
}
public static void main(String args[]){
A a1=null;
A a2=new A(new A(null));
A a3=new A(a2);
a1=a3;
a1.a=new A(null);
a2.a=null; //Line12
System.gc();
}
}

[Ogeh Ikem]

A similar question was asked a few years ago.

Take a look at this https://coderanch.com/t/417810/java-programmer-SCJP/certification/Garbage-Collection

[Seetharaman Venkatasamy]

Please Search First

[Naveen Madarapu]

please And this 2nd one

how many objects are eligible for gabage collection after executing c.aob = null;

class A{ 
A aob; 
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(); //up to here C object having the two references one is c and another one is b.aob
c=b; //here C object reference is point to B object so one reference is gone here
c.aob=null; //here c pointing to b object variable aob that is set to null that variable hold the actual C object reference second one is also gone so no more reference for C object.
System.gc(); 
} 
} 

in this one object is eligible for GC
that is C object


for easy understanding purpose you can draw each and every object and it references

[Ademola Okerinde]

Thanks a lot.
information very helpful.

Sorry for repeating question, am new to the forum.