< H2 > description < H2 > physical environment 2GB memory < H2 > phenomenon description: < H2 > I have a program (no source code) that uses Netty at the bottom (don t be misled into a problem with NIO, but it may be related to DirectMemory), ther...
the following is the source code of the unlinkFirst method in LinkedList where f is the head of the linked list it says that f.next = null; is good for gc I don t quite understand, f is already ROOT unreachable must be gc Why does it help gc? to s...
Car car = new Car(22000,"silver"); WeakReference<Car> weakCar = new WeakReference<Car>(car); car = null; System.gc(); when the above code is gc, weakCar.get () returns null, indicating that the Car object has been recycled, but th...
The variable name is stored in the stack space, and the stack area is first in and then out, so how does it pop up when you actively unset a variable? ...
The code is as follows: package referenceCoutingGC; ** * * testGC()ogjAogjBGC * * public class referenceCoutingGC { public Object instance = null; private static final int _1MB = 1024*1024; private byte[] bigSize = ...
Let s not talk about the principle of the train algorithm here. the train algorithm is the gc algorithm used by the G1 collector D _ C are three objects that need to be called to each other. There are no other citations. But when the algorithm sc...
in most cases in JAVA, objects are allocated in Eden by default, and when GC is triggered, if there is not enough space in survivor, it will be put into the old age. suppose the following scenario: eden:80M survivor1:10M survivor2:10M now survivor2 is...
Mini Program draws the text with canvas, and sets the text to be bold but does not respond. The code is as follows ctx.font=`50px bold` ctx.fillText("",0,0) ...
write a client, of FTP using passive mode. After the data socket for transmission is established, how does the socket for the command inform data socket?? int client_data_socket = get_client_data_socket(client_cmd_port); sprintf(send_buffer, "...
A headache. I want to match a positive integer, but it doesn t include something like 1.0, so I want to convert a string first, and then go to the matching point regularly. as a result, if any form of conversion fails, 1.0 will be converted to 1. and d...
following the official description of Anko, I added the following code to my dependency: api "org.jetbrains.anko:anko-commons:$anko_version " then I want to use his startActivity < AAA > () method. Cannot use The project uses Kotlin develop...
I haven t been in contact with go for long. Today, I would like to discuss several questions about the literal quantity of structure, which can be regarded as a kind of record. first question: type Point struct{X,Y float64} func pot(x,y float64)...