phantom-reference

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When a PhantomReference/SoftReference/WeakReference is queued, how do you know what it referred to?

I haven\'t used PhantomReferences.There seems to be very few good examples of real-world use. When a phantom shows up in your queue, how do you know which object it is/was?The get() method appears to[详细]

2023-04-12 02:41 分类：问答
why PhantomReference does not work?

Demo code: import java.lang.ref.PhantomReference; import java.lang.ref.ReferenceQueue; public class Main {[详细]

2023-04-06 21:17 分类：问答
Mixing different reference types in one collection

SoftReference, WeakReference, PhantomReference may be used to customize the process of garbage collection. All of them extend Reference<T> therefore it is possible to mix them in single collecti[详细]

2023-03-15 15:03 分类：问答
How finalize method works with phantom reference in java

Hi I have one doubt about phantom reference. What I understand the finalize method is called just before when object are going for garbage collection. But some time if object are not eligible for garb[详细]

2023-02-25 02:41 分类：问答
Uses of different reference types in Java

I\'ve recently been playing around with soft, weak and phantom reference types in Java and have been wondering if there\'s any uses out there for them that I haven\'t come across. I\'ve used them in t[详细]

2023-02-05 16:06 分类：问答
Phantom Contact Account Appearing - Android

I am writing an app that allows the user to select from a list of names and then add one of the names (with phone number, etc) to their contacts. When I retrieve my phone\'s list of Contact Accounts,[详细]

2023-01-31 02:34 分类：问答
Member-function pointers and phantom classes

I\'ve been messing about with member-function pointers in relation to a previous question. In the code below I call methods on a class (B) that change a variable (count) in it, but I never make an ins[详细]

2023-01-20 22:53 分类：问答
Understanding Java's Reference classes: SoftReference, WeakReference, and PhantomReference

Can someone explain the difference between the three Reference classes (or post a link to a nice explanation)? SoftReference > WeakReference > PhantomReference, but when would I use each one? Why is t[详细]

2023-01-08 14:26 分类：问答
$n = 2; 10-$n = 87

well this is what i am doing: $total = (array_sum($odds))+$evens; $total = str_split($total); echo \'total[1]: \'.$total[1].\'<br />\';[详细]

2023-01-07 18:59 分类：问答
How Phantom reference works?

The API doc says This reference type differs from the others in that it isn\'t meant to be used to access the object, but as a signal that the object has already been finalized, and the garbage coll[详细]

2022-12-20 04:49 分类：问答