for unprotected multithreads, it is uncertain when some data is modified in one thread and when it is submitted to main memory, and the values used by other threads are not necessarily up-to-date. in the case of volatile modification, it is guaranteed t...

import java.util.ArrayList; import java.util.List; public class Main { ThreadLocal<Integer> threadLocal = new ThreadLocal<>(); int i; public void increment() { iPP; } public static void main(String[] args) { ...

Worker the creation code is as follows: var script = ""; script += "var a = 0;"; script += "aPP;"; script += "console.log(a)"; var blob = new Blob([script] , { type: text javascript });...

threadlocalmap uses open addressing to resolve hash conflicts, but the design of node in threadlocalmap is still . static class Entry extends WeakReference<ThreadLocal<?>> { ** The value associated with this ThreadLocal. * ...

java used user-mode threads before 1.2. why did it change to lightweight processes to implement threads? Aren t user-mode threads more efficient? Although the management and scheduling is a little complicated! ...

give me an example. To implement a telephone charging system for top-up cards and secret recharge phone numbers, for example, there are 1 million phone charge cards and 1 million phone numbers in my table, and each phone number corresponds to a top-up c...

when it comes to Thread.join () in the Art of Java concurrent programming, it says that its implementation depends on wait notifyAll s waiting notification mechanism, specifically: when a thread terminates, it calls its own notifyAll method? How can y...

< H2 > the first case < H2 > package com.btmans.thread; public class TestSync implements Runnable{ int b = 100; public synchronized void m1() throws Exception{ b = 1000; Thread.sleep(5000); System.out.println("b=&q...