并发编程笔记2

交替输出事例

@Slf4j
public class Demo02 {
    public static void main(String[] args) {
        Await await = new Await(5);
        Condition a = await.newCondition();
        Condition b = await.newCondition();
        Condition c = await.newCondition();
        new Thread(()->{
            await.print("a",a,b);
        },"t1").start();
        new Thread(()->{
            await.print("b",b,c);
        },"t2").start();
        new Thread(()->{
            await.print("c",c,a);
        },"t3").start();
        await.lock();
        a.signal();
        await.unlock();

    }


}
@Slf4j
class Await extends ReentrantLock{
    private int num;

    public Await(int num) {
        this.num = num;
    }
    public void print(String str, Condition condition, Condition next){
        for (int i = 0; i 

static boolean run = true;

    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread(() -> {
            while (run) {
            }
        });
        t.start();
        sleep(1);
        run = false; // 线程t不会如预想的停下来
    }