How to safely publish an object

Object publication: Enables an object to be used in code outside the current scope

How can I safely publish an object?

1: mutable objects such as the release by means of locking

2: Immutable objects can be freely released

A mutable object must be published in a secure manner, which means that the thread that publishes and uses the object must use synchronization.

To secure a publishing object, the state of the object and the reference to the object must be visible to other threads, common practices include:

1: Initializing an object reference in a static initialization function

2: Save the object's reference to a volatile type field

3: Save the object's reference to the correct constructed object's final field

4: Save the object's reference to a lock-protected domain

5: Using a thread-safe container

6: The simplest and safest way to use statically constructed objects is to use static initializers.

public static Holder Holer = new Holder (23);

The reason is that the static initializer is performed by the JVM during the initialization phase of the class, and because there is a synchronization mechanism inside the JVM, any objects that can be initialized in this manner can be safely published.

How to safely publish an object