• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

help on Garbage Collection analysis

 
Greenhorn
Posts: 11
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
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
Greenhorn
Posts: 11
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

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();
}
}

 
Ranch Hand
Posts: 180
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
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
 
Ranch Hand
Posts: 5575
Eclipse IDE Windows XP Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Please Search First
 
Ranch Hand
Posts: 64
Eclipse IDE Spring Tomcat Server
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

please And this 2nd one

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




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
Greenhorn
Posts: 11
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks a lot.
information very helpful.

Sorry for repeating question, am new to the forum.
reply
    Bookmark Topic Watch Topic
  • New Topic