Java ThreadLocal

ThreadLocal类，代表一个线程局部变量，通过把数据放在ThreadLocal中，可以让每个线程创建一个该变量的副本。也可以看成是线程同步的另一种方式吧，通过为每个线程创建一个变量的线程本地副本，从而避免并发线程同时读写同一个变量资源时的冲突。

示例如下：

import java.util.Random;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.TimeUnit;import com.sun.javafx.webkit.Accessor;public class ThreadLocalTest {  static class ThreadLocalVariableHolder {    private static ThreadLocal<Integer> value = new ThreadLocal<Integer>() {      private Random random = new Random();            protected synchronized Integer initialValue() {        return random.nextInt(10000);      }    };        public static void increment() {      value.set(value.get() + 1);    }        public static int get() {      return value.get();    }  }    static class Accessor implements Runnable{    private final int id;        public Accessor(int id) {      this.id = id;    }        @Override    public void run() {      while (!Thread.currentThread().isInterrupted()) {        ThreadLocalVariableHolder.increment();        System.out.println(this);        Thread.yield();      }    }        @Override    public String toString() {      return "#" + id + ": " + ThreadLocalVariableHolder.get();    }      }    public static void main(String[] args) {    ExecutorService executorService = Executors.newCachedThreadPool();    for (int i = 0; i < 5; i++) {      executorService.execute(new Accessor(i));    }    try {      TimeUnit.MICROSECONDS.sleep(1);    } catch (InterruptedException e) {      e.printStackTrace();    }    executorService.shutdownNow();  }}

海外公司注册、海外银行开户、跨境平台代入驻、VAT、EPR等知识和在线办理：https://www.xlkjsw.com

原标题：Java ThreadLocal

关键词：JAVA