演示ThreadLocal的使用

Test.java

package com.kaishengit.ppt;

public class Test {

    public static void main(String[] args) throws InterruptedException {
        User user = new User();
        Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                user.setName("Jcak");
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println("thread1 name :" + user.getName());
            }
        });

        Thread thread2 = new Thread(new Runnable() {
            @Override
            public void run() {
                user.setName("Rose");
                try {
                    Thread.sleep(150);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println("thread2 name :" + user.getName());
            }
        });

        thread.start();
        thread2.start();
    }
}

User.java

package com.kaishengit.ppt;

public class User {

    private ThreadLocal<String> nameThreadLocal = new ThreadLocal<>();

    public void setName(String name) {
        nameThreadLocal.set(name);
    }

    public String getName() {
        return nameThreadLocal.get();
    }
}