Programmer Think

1.1Callable and Future and FutureTask creation process Many times, we ask multithreading to help us deal with things. We need to get the return value, and we can deal with exceptions Note that callable can have a return value or throw an exception, which is key. 1.1.2.callable implements multithreading by itself, but there is no re ...

summary Producer consumer model: a typical design pattern, which is a solution designed by people according to typical scenes Application scenario: it is applied to the scenario where a large amount of data is generated and processed Specific implementation: there are multiple producer and consumer threads to produce and process a huge amoun ...

preface I think the topic of code looping is very interesting. Because as long as developers, they will step through this pit. If you really haven't stepped on it, it only means that you write less code, or you are a real God. Although many times, we try our best to avoid such problems, many times, the dead cycle comes quietly and pits you in ...

thread 1. Linux thread concept A thread is a subtask that runs independently in a process. It can be understood as a "lightweight process". There can be multiple threads in a process, and these threads use the same PCB. 1. An execution route in a program is called a thread. A more accurate definition is that a thread is "a se ...

In the concurrent environment, in order to ensure the thread safety of sharing variable data, we need to use the locking mechanism. If the lock is not used properly, it may cause deadlock, thread starvation and other problems. If a deadlock occurs in a Java application, the program cannot be recovered automatically, which will seriously cause ...

python concurrent crawler - multithreaded, thread pool implementation A web crawler usually consists of sending requests, getting responses, parsing pages, saving locally, and so on. Of course, the most difficult and detailed part is the page parsing link. For different pages, the parsing difficulty will inevitably vary. Even some websites ...

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1. Thread synchronization What is thread synchronization? Let's first look at a piece of code of the ticket selling system, and then analyze this problem: package com.test; /** * @decrition Simulated ticket selling thread */ public class Ticket implements Runnable { //Number of votes currently owned private int num = 100; public void ...

Catalogue of series articles Java thread learning introduction to the basic use of threads catalogue   1, Writing and reading of XML and excel 1. Writing and reading of XML 1. Reading of XML 2. Writing XML 2. Writing and reading excel 1. Reading excel 2. Writing excel II. Network programming 3, Reflection 1. Three methods of obtai ...

Link: link. In high-performance programming, concurrent programming has become a very important part. When the performance of single core CPU has reached the limit, we can only further improve the performance of the system through multi-core, so concurrent programming is born. Because concurrent programming is more difficult and error pron ...