Java高并发编程之ThreadLocal

package vip.ithub.concurrent;

import java.util.concurrent.TimeUnit;

/**
* @author: Chenzhenyong
* @description: ThreadLocal是使用空间换时间，synchronized是使用时间换空间
* @date: Created in 16:01 2018/11/14
*/
public class ThreadLocal01 {
    static ThreadLocal<Person> threadLocal = new ThreadLocal<>();

    public static void main(String[] args) {
        new Thread(()->{
            try {
                TimeUnit.SECONDS.sleep(2);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("t1:" + threadLocal.get());
        }, "t1").start();

        new Thread(()->{
            try {
                TimeUnit.SECONDS.sleep(1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            threadLocal.set(new Person());
            System.out.println("t2:" + threadLocal.get());
        }, "t2").start();
    }

    static class Person {
        String name = "zhangsan";

        @Override
        public String toString() {
            return "Person{" +
                    "name='" + name + '\'' +
                    '}';
        }
    }
}

运行结果：

t2:Person{name='zhangsan'}
t1:null