• 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:
  • Tim Cooke
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Liutauras Vilda
Sheriffs:
  • Rob Spoor
  • Junilu Lacar
  • paul wheaton
Saloon Keepers:
  • Stephan van Hulst
  • Tim Moores
  • Tim Holloway
  • Carey Brown
  • Scott Selikoff
Bartenders:
  • Piet Souris
  • Jj Roberts
  • fred rosenberger

Can anyone help

 
Ranch Hand
Posts: 18944
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
At what point is the object anObj available for garbage collection.
01: public class Base{
02:
03: private void test() {
04:
05: if(true) {
06: String anObj = "sample";
07: String locObj = anObj;
08: anObj.trim();
09: anObj = null;
10: locObj.trim();
11: }
12: }
13:
14: static public void main(String[] a) {
15: new Base().test();
16: }
17:
18: }
Select most appropriate answer
a) After line 7
b) After line 8
c) After line 9
d) After line 10
e) After line 11
please help:
thank
Yaco
 
Greenhorn
Posts: 17
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi:
I think the answer for your question is 'b' (After line 8). Immediately after line# 8, the 'anObj' reference has been assigned 'null', making the 'anObj' eligible for garbage collection.
Cheers,
Balu
 
Trailboss
Posts: 23453
IntelliJ IDE Firefox Browser Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
PROPER NAMES ARE NOW REQUIRED!
See http://www.javaranch.com/ubb/Forum10/HTML/000180.html for details.
 
Greenhorn
Posts: 3
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Isn't 'C' is the answer. Till line 9 object still alive only after that object looses its ref.
 
Ranch Hand
Posts: 243
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
At what point is the object anObj available for garbage collection.
01: public class Base{
02:
03: private void test() {
04:
05: if(true) {
06: String anObj = "sample";
I think the question really means at what point is the object referenced by variable anObj can be GCed. at line 6, an object reference variable of Type String is assigned a new String object which contains "sample". till line 10 this object is still reachable by the locObj reference variable.so it is only after the locObj goes out of scope in line 11 that the original object can be GCed.
Correct me if I am wrong.


 
reply
    Bookmark Topic Watch Topic
  • New Topic