基于ThreadLocal实现一个线程安全和线程级别数据传递的demo

public class ThreadLocalDemo {

    static Integer share; // 共享变量
    public static void main(String[] args) throws InterruptedException {
        // 创建一个ThreadLocal，初始化值为0
        ThreadLocal<Integer> threadLocal = new InheritableThreadLocal();
        threadLocal.set(0);
        // 创建线程1
        Thread thread1 = new Thread(() -> {
            share = threadLocal.get() + 1;
        });
        // 创建线程2
        Thread thread2 = new Thread(() -> {
            threadLocal.set(share);
            share = threadLocal.get() + 1;
        });
        share = threadLocal.get();
        System.out.println("Main thread: share1 = " + share);
        // 启动线程1
        thread1.start();
        thread1.join();
        System.out.println("Main thread: share2 = " + share);
        // 启动线程2
        thread2.start();
        thread2.join();
        System.out.println("Main thread: share3 = " + share);
    }
}

运行结果