Programmer Group

Status of thread pool (5 kinds): The AtomicInteger variable ctl is very powerful: the low 29 bits represent the number of threads in the thread pool, and the high 3 bits represent the running state of the thread pool: RUNNING: -1 << COUNT_ Bits, that is, the upper 3 bits are 111. The thread pool in this state will receive new tasks and ...

The implementation principle of AtomicLong is consistent with AtomicInteger, except that one is for long variables and the other is for int variables. How does the AtomicBoolean class update the boolean variable? The core method is compareandset method, and its source code is as follows: public final boolean compareAndSet(boolean expect, bool ...

preface Mastering thread pool is a basic requirement for back-end programmers. I believe that almost everyone will be asked about thread pool during the job interview. I collected several classic thread pool questions on the Internet and took them as a starting point to talk about my understanding of thread pool. If ...

Notes from beginners of APP Android automatic test. Please give us more advice on what is wrong 1, Start appium server 1. Start a single appium server through the command line window appium -- Directly open the default 4723 port number appium -p 4723 -- use-p To start the fixed port number appium The server Copy code 2. Start multiple ...

@Override public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { } @Override public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { String editable = evPwd.getText().toString(); String regEx = "[^a-zA-Z0-9]"; //Only letters or numbers can be entered Pattern p = Pattern.co ...

Jetpack Compose does not have an official Banner control at present, so it can only be completed by writing and searching some materials. Thank you very much for sharing these contents before. design sketch accompanist group Library accompanist The group library aims to provide supplementary functions for jetpack composition. There are ma ...

1, Foreword I've seen the interview questions of Holy Grail layout and double wing layout many times. Each time I thought I understood it. As a result, I didn't see it for a while or forgot it. Maybe the interview level I experienced was too low to get it.. In addition, there are generally no such optimization requirements in normal developmen ...

Similar string Give you a list of strings strs. Each string in the list is an alphabetic word for all other strings in strs. How many similar string groups are there in strs? Using the idea of joint search set, the string array is transformed into a graph to find the connected edge class Solution { public: vector<int> f; int fi ...

Hello, I'm brother Xiao Dao. Today's interview topic is: closure. definition Closure is defined in computer science as a function that references internal variables of a function. After reading the definition, I fell into a deep thought... Indeed, if I hadn't touched closures before or didn't understand closures, this definition is really a ...

1. About css style penetration When we use UI library components, scopeds isolate styles and sometimes modify them without removing the scopeds property to cause style overrides between components. At this point we can penetrate scoped in a special way Outer Container >>> assembly { } Outer Container /deep/ assembly { } Outer Conta ...