Java instance creation with object as parameter
When i create an object of a class which accepts object as a parameter
for Example
GarbageCollected gc= new GarbageCollected();
WeakReference<GarbageCollected> reference = new WeakReference<GarbageCollected>()(gc);
So here how does the reference 'gc' works internally while one creates the object of 'WeakReference' class with "gc' as the argument.
garbage-collection parameter-passing weak-references
add a comment |
When i create an object of a class which accepts object as a parameter
for Example
GarbageCollected gc= new GarbageCollected();
WeakReference<GarbageCollected> reference = new WeakReference<GarbageCollected>()(gc);
So here how does the reference 'gc' works internally while one creates the object of 'WeakReference' class with "gc' as the argument.
garbage-collection parameter-passing weak-references
1
When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things likeWeakReference
.
– Holger
Nov 23 '18 at 17:31
@Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
– Rajiv
Nov 29 '18 at 15:53
What do you mean with “how the referencing happens”? Further, do you understand thatWeakReference
is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
– Holger
Nov 29 '18 at 16:23
add a comment |
When i create an object of a class which accepts object as a parameter
for Example
GarbageCollected gc= new GarbageCollected();
WeakReference<GarbageCollected> reference = new WeakReference<GarbageCollected>()(gc);
So here how does the reference 'gc' works internally while one creates the object of 'WeakReference' class with "gc' as the argument.
garbage-collection parameter-passing weak-references
When i create an object of a class which accepts object as a parameter
for Example
GarbageCollected gc= new GarbageCollected();
WeakReference<GarbageCollected> reference = new WeakReference<GarbageCollected>()(gc);
So here how does the reference 'gc' works internally while one creates the object of 'WeakReference' class with "gc' as the argument.
garbage-collection parameter-passing weak-references
garbage-collection parameter-passing weak-references
asked Nov 23 '18 at 11:04
RajivRajiv
5113
5113
1
When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things likeWeakReference
.
– Holger
Nov 23 '18 at 17:31
@Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
– Rajiv
Nov 29 '18 at 15:53
What do you mean with “how the referencing happens”? Further, do you understand thatWeakReference
is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
– Holger
Nov 29 '18 at 16:23
add a comment |
1
When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things likeWeakReference
.
– Holger
Nov 23 '18 at 17:31
@Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
– Rajiv
Nov 29 '18 at 15:53
What do you mean with “how the referencing happens”? Further, do you understand thatWeakReference
is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
– Holger
Nov 29 '18 at 16:23
1
1
When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like
WeakReference
.– Holger
Nov 23 '18 at 17:31
When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like
WeakReference
.– Holger
Nov 23 '18 at 17:31
@Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
– Rajiv
Nov 29 '18 at 15:53
@Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
– Rajiv
Nov 29 '18 at 15:53
What do you mean with “how the referencing happens”? Further, do you understand that
WeakReference
is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.– Holger
Nov 29 '18 at 16:23
What do you mean with “how the referencing happens”? Further, do you understand that
WeakReference
is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.– Holger
Nov 29 '18 at 16:23
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53445496%2fjava-instance-creation-with-object-as-parameter%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53445496%2fjava-instance-creation-with-object-as-parameter%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like
WeakReference
.– Holger
Nov 23 '18 at 17:31
@Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
– Rajiv
Nov 29 '18 at 15:53
What do you mean with “how the referencing happens”? Further, do you understand that
WeakReference
is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.– Holger
Nov 29 '18 at 16:23