Java garbage collector

Automatic collection of objects :

Useless objects

The object that left the scope;

No references point to the object;

The Java runtime system periodically frees memory used by useless objects through the garbage collector.

The Java runtime system automatically invokes the Finalize () method of an object before it is automatically garbage collected.

garbage collector :

Automatically sweep the dynamic memory area of a polygon object, marking objects that are no longer being used for garbage collection

Runs as a background thread and is typically executed asynchronously when the system is idle. (Asynchronous for non-shared data, followed by)

Finallize () Method:

　Declared in class object (Adam), so each Java class has this method;

Used to release resources

Class can override this method

The Finalize () method may be executed in any order at any time.

　　

Java garbage collector