让线程顺序运行的11种方法

一、让线程顺序运行的11种方法

1 方法说明

1. 使用线程的join方法
2. 使用主线程的join方法
3. 使用线程的wait方法
4. 使用线程的线程池方法
5. 使用线程的Condition（条件变量）方法
6. 使用CountDownLatch（倒计数）的方法
7. 使用线程的CyclicBarrier（回环栅栏）方法
8. 使用线程的Semaphore（信号量）方法
9. 使用LockSupport的park与unpark方法
10. 使用阻塞队列的put与take方法
11. 使用CAS思想来完成多线程的顺序执行AtomicReference

2 实现

2.1 使用线程的join方法

**join()😗*是Theard的方法，作用是调用线程需等待该join()线程执行完成后，才能继续用下运行。

**应用场景：**当一个线程必须等待另一个线程执行完毕才能执行时可以使用join方法。

2.1.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.TimeUnit;@Slf4jpublic class ThreadDemo1 {    public static void main(String[] args) {        Thread threadA = new Thread(() -> {            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-a");        Thread threadB = new Thread(() -> {            try {                threadA.join();            } catch (InterruptedException e) {                e.printStackTrace();            }            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-b");        Thread threadC = new Thread(() -> {            try {                threadB.join();            } catch (InterruptedException e) {                e.printStackTrace();            }            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-c");        threadA.start();        threadB.start();        threadC.start();    }        public static void sleep(long timeOut) {        sleep(timeOut, TimeUnit.MILLISECONDS);    }        public static void sleep(long timeOut, TimeUnit unit) {        try {            TimeUnit.MILLISECONDS.sleep(unit.toMillis(timeOut));        } catch (InterruptedException e) {            log.error("", e);        }    }}

2.1.2 运行结果

2023-04-11 09:48:23 [ thread-a ]  INFO ThreadDemo1:39 - start...2023-04-11 09:48:23 [ thread-a ]  INFO ThreadDemo1:42 - end...2023-04-11 09:48:23 [ thread-b ]  INFO ThreadDemo1:51 - start...2023-04-11 09:48:23 [ thread-b ]  INFO ThreadDemo1:54 - end...2023-04-11 09:48:23 [ thread-c ]  INFO ThreadDemo1:63 - start...2023-04-11 09:48:23 [ thread-c ]  INFO ThreadDemo1:66 - end...

2.2 使用主线程的join方法

在主线程中调用线程的join方法

2.2.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo2 {    public static void main(String[] args) throws Exception {        Thread threadA = new Thread(() -> {            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-a");        Thread threadB = new Thread(() -> {            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-b");        Thread threadC = new Thread(() -> {            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-c");        threadA.start();        threadA.join();        threadB.start();        threadB.join();        threadC.start();    }}

2.2.2 运行结果

2023-04-11 09:54:07 [ thread-a ]  INFO ThreadDemo2:36 - start...2023-04-11 09:54:07 [ thread-a ]  INFO ThreadDemo2:39 - end...2023-04-11 09:54:07 [ thread-b ]  INFO ThreadDemo2:43 - start...2023-04-11 09:54:07 [ thread-b ]  INFO ThreadDemo2:46 - end...2023-04-11 09:54:07 [ thread-c ]  INFO ThreadDemo2:50 - start...2023-04-11 09:54:07 [ thread-c ]  INFO ThreadDemo2:53 - end...

2.3 使用线程的wait方法

2.3.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo3 {    static final Object LOCK1 = new Object();    static final Object LOCK2 = new Object();        static boolean isRun1 = false;    static boolean isRun2 = false;    public static void main(String[] args) {        new Thread(() -> {            synchronized (LOCK1) {                log.info("start...");                sleep(100);                log.info("end...");                isRun1 = true;                LOCK1.notify();            }        }, "thread-a").start();        new Thread(() -> {            synchronized (LOCK1) {                while (!isRun1) {                    try {                        LOCK1.wait();                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                }                synchronized (LOCK2) {                    log.info("start...");                    sleep(100);                    log.info("end...");                    isRun2 = true;                    LOCK2.notify();                }            }        }, "thread-b").start();        new Thread(() -> {            synchronized (LOCK2) {                while (!isRun2) {                    try {                        LOCK2.wait();                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                }                log.info("start...");                sleep(100);                log.info("end...");            }        }, "thread-c").start();    }}

2.3.2 运行结果

2023-04-11 10:09:54 [ thread-a ]  INFO ThreadDemo3:47 - start...2023-04-11 10:09:54 [ thread-a ]  INFO ThreadDemo3:49 - end...2023-04-11 10:09:54 [ thread-b ]  INFO ThreadDemo3:65 - start...2023-04-11 10:09:54 [ thread-b ]  INFO ThreadDemo3:67 - end...2023-04-11 10:09:54 [ thread-c ]  INFO ThreadDemo3:83 - start...2023-04-11 10:09:54 [ thread-c ]  INFO ThreadDemo3:85 - end...

2.4 使用线程的线程池方法

JAVA通过Executors提供了四种线程池

• 单线程化线程池(newSingleThreadExecutor);
• 可控最大并发数线程池(newFixedThreadPool);
• 可回收缓存线程池(newCachedThreadPool);
• 支持定时与周期性任务的线程池(newScheduledThreadPool)。

**单线程化线程池(newSingleThreadExecutor)😗*优点，串行执行所有任务。

**submit()：**提交任务。

**shutdown()：**方法用来关闭线程池，拒绝新任务。

**应用场景:**串行执行所有任务。如果这个唯一的线程因为异常结束，那么会有一个新的线程来替代它。此线程池保证所有任务的执行顺序按照任务的提交顺序执行。

2.4.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo4 {    public static void main(String[] args) {        ExecutorService poolExecutor = Executors.newSingleThreadExecutor();        poolExecutor.submit(() -> {            log.info("threadA start...");            sleep(100);            log.info("threadA end...");        });        poolExecutor.submit(() -> {            log.info("threadB start...");            sleep(100);            log.info("threadB end...");        });        poolExecutor.submit(() -> {            log.info("threadC start...");            sleep(100);            log.info("threadC end...");        });        poolExecutor.shutdown();    }}

2.4.2 运行结果

2023-04-11 10:27:11 [ pool-1-thread-1 ]  INFO ThreadDemo4:41 - threadA start...2023-04-11 10:27:11 [ pool-1-thread-1 ]  INFO ThreadDemo4:43 - threadA end...2023-04-11 10:27:11 [ pool-1-thread-1 ]  INFO ThreadDemo4:47 - threadB start...2023-04-11 10:27:11 [ pool-1-thread-1 ]  INFO ThreadDemo4:49 - threadB end...2023-04-11 10:27:11 [ pool-1-thread-1 ]  INFO ThreadDemo4:53 - threadC start...2023-04-11 10:27:11 [ pool-1-thread-1 ]  INFO ThreadDemo4:55 - threadC end...

2.5 使用线程的Condition(条件变量)方法

**Condition（条件变量）😗*通常与一个锁关联。需要在多个Contidion中共享一个锁时，可以传递一个Lock/RLock实例给构造方法，否则它将自己生成一个RLock实例。

• Condition中await()方法类似于Object类中的wait()方法。
• Condition中await(long time,TimeUnit unit)方法类似于Object类中的wait(long time)方法。
• Condition中signal()方法类似于Object类中的notify()方法。
• Condition中signalAll()方法类似于Object类中的notifyAll()方法。

**应用场景：**Condition是一个多线程间协调通信的工具类，使得某个，或者某些线程一起等待某个条件（Condition）,只有当该条件具备( signal 或者 signalAll方法被调用)时 ，这些等待线程才会被唤醒，从而重新争夺锁。

2.5.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.Lock;import java.util.concurrent.locks.ReentrantLock;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo5 {    static final Lock LOCK = new ReentrantLock();    static final Condition CONDITION_A = LOCK.newCondition();    static final Condition CONDITION_B = LOCK.newCondition();    static boolean isRunA = false;    static boolean isRunB = false;    public static void main(String[] args) {        new Thread(() -> {            // 加锁            LOCK.lock();            log.info("start...");            try {                sleep(100);            } catch (Exception e) {                log.error("", e);            } finally {                isRunA = true;                CONDITION_A.signal();                // 解锁                LOCK.unlock();                log.info("end...");            }        }, "thread-a").start();        new Thread(() -> {            // 加锁            LOCK.lock();            while (!isRunA) {                try {                    CONDITION_A.await();                } catch (InterruptedException e) {                    e.printStackTrace();                }            }            log.info("start...");            try {                sleep(100);            } catch (Exception e) {                log.error("", e);            } finally {                isRunB = true;                CONDITION_B.signal();                // 解锁                LOCK.unlock();                log.info("end...");            }        }, "thread-b").start();        new Thread(() -> {            // 加锁            LOCK.lock();            while (!isRunB) { // 这里根据状态码，来使thread-c处于一直等待状态                try {                    CONDITION_B.await();                } catch (InterruptedException e) {                    e.printStackTrace();                }            }            log.info("start...");            try {                sleep(100);            } catch (Exception e) {                log.error("", e);            } finally {                // 解锁                LOCK.unlock();                log.info("end...");            }        }, "thread-c").start();    }}

2.5.2 运行结果

2023-04-11 10:34:06 [ thread-a ]  INFO ThreadDemo5:48 - start...2023-04-11 10:34:06 [ thread-a ]  INFO ThreadDemo5:58 - end...2023-04-11 10:34:06 [ thread-b ]  INFO ThreadDemo5:72 - start...2023-04-11 10:34:06 [ thread-b ]  INFO ThreadDemo5:82 - end...2023-04-11 10:34:06 [ thread-c ]  INFO ThreadDemo5:96 - start...2023-04-11 10:34:06 [ thread-c ]  INFO ThreadDemo5:104 - end...

2.6 使用线程的CountDownLatch（倒计数）方法

**CountDownLatch:**位于java.util.concurrent包下，利用它可以实现类似计数器的功能。

**应用场景:**比如有一个任务C，它要等待其他任务A,B执行完毕之后才能执行，此时就可以利用CountDownLatch来实现这种功能了。

2.6.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.CountDownLatch;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo6 {    public static void main(String[] args) {        CountDownLatch countDownLatchA = new CountDownLatch(1);        CountDownLatch countDownLatchB = new CountDownLatch(1);        new Thread(() -> {            log.info("start...");            sleep(100);            log.info("end...");            countDownLatchA.countDown();        }, "thread-a").start();        new Thread(() -> {            try {                countDownLatchA.await();            } catch (InterruptedException e) {                e.printStackTrace();            }            log.info("start...");            sleep(100);            log.info("end...");            countDownLatchB.countDown();        }, "thread-b").start();        new Thread(() -> {            try {                countDownLatchB.await();            } catch (InterruptedException e) {                e.printStackTrace();            }            log.info("start...");            sleep(100);            log.info("end...");        }, "thread-c").start();    }}

2.6.2 运行结果

2023-04-11 10:37:24 [ thread-a ]  INFO ThreadDemo6:40 - start...2023-04-11 10:37:24 [ thread-a ]  INFO ThreadDemo6:42 - end...2023-04-11 10:37:24 [ thread-b ]  INFO ThreadDemo6:52 - start...2023-04-11 10:37:25 [ thread-b ]  INFO ThreadDemo6:54 - end...2023-04-11 10:37:25 [ thread-c ]  INFO ThreadDemo6:64 - start...2023-04-11 10:37:25 [ thread-c ]  INFO ThreadDemo6:66 - end...

2.7 使用线程的CyclicBarrier（回环栅栏）方法

**CyclicBarrier(回环栅栏)😗*通过它可以实现让一组线程等待至某个状态之后再全部同时执行。叫做回环是因为当所有等待线程都被释放以后，CyclicBarrier可以被重用。我们暂且把这个状态就叫做barrier，当调用await()方法之后，线程就处于barrier了。

**应用场景:**公司组织春游,等待所有的员工到达集合地点才能出发，每个人到达后进入barrier状态。都到达后，唤起大家一起出发去旅行。

2.7.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.BrokenBarrierException;import java.util.concurrent.CyclicBarrier;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo7 {    public static void main(String[] args) {        CyclicBarrier cyclicBarrier1 = new CyclicBarrier(2);        CyclicBarrier cyclicBarrier2 = new CyclicBarrier(2);        new Thread(() -> {            log.info("start...");            sleep(100);            log.info("end...");            try {                cyclicBarrier1.await();            } catch (InterruptedException | BrokenBarrierException e) {                e.printStackTrace();            }        }, "thread-a").start();        new Thread(() -> {            try {                cyclicBarrier1.await();            } catch (InterruptedException | BrokenBarrierException e) {                e.printStackTrace();            }            log.info("start...");            sleep(100);            log.info("end...");            try {                cyclicBarrier2.await();            } catch (InterruptedException | BrokenBarrierException e) {                e.printStackTrace();            }        }, "thread-b").start();        new Thread(() -> {            try {                cyclicBarrier2.await();            } catch (InterruptedException | BrokenBarrierException e) {                e.printStackTrace();            }            log.info("start...");            sleep(100);            log.info("end...");        }, "thread-c").start();    }}

2.7.2 运行结果

2023-04-11 10:47:37 [ thread-a ]  INFO ThreadDemo7:41 - start...2023-04-11 10:47:37 [ thread-a ]  INFO ThreadDemo7:43 - end...2023-04-11 10:47:37 [ thread-b ]  INFO ThreadDemo7:57 - start...2023-04-11 10:47:38 [ thread-b ]  INFO ThreadDemo7:59 - end...2023-04-11 10:47:38 [ thread-c ]  INFO ThreadDemo7:75 - start...2023-04-11 10:47:38 [ thread-c ]  INFO ThreadDemo7:77 - end...

2.8 使用Sephmore(信号量)实现线程按顺序运行

**Sephmore(信号量)😗*Semaphore是一个计数信号量,从概念上将，Semaphore包含一组许可证,如果有需要的话，每个acquire()方法都会阻塞，直到获取一个可用的许可证,每个release()方法都会释放持有许可证的线程，并且归还Semaphore一个可用的许可证。然而，实际上并没有真实的许可证对象供线程使用，Semaphore只是对可用的数量进行管理维护。

**acquire()😗*当前线程尝试去阻塞的获取1个许可证,此过程是阻塞的,当前线程获取了1个可用的许可证，则会停止等待，继续执行。

**release()😗*当前线程释放1个可用的许可证。

**应用场景:**Semaphore可以用来做流量分流，特别是对公共资源有限的场景，比如数据库连接。假设有这个的需求，读取几万个文件的数据到数据库中，由于文件读取是IO密集型任务，可以启动几十个线程并发读取，但是数据库连接数只有10个，这时就必须控制最多只有10个线程能够拿到数据库连接进行操作。这个时候，就可以使用Semaphore做流量控制。

2.8.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.Semaphore;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo8 {    public static void main(String[] args) {        // 这里一定要将permits设置为0，只有设置为0 thread-a才会先执行，thread-b才会后执行        Semaphore semaphore1 = new Semaphore(0);        // 同上        Semaphore semaphore2 = new Semaphore(0);        new Thread(() -> {            log.info("start...");            sleep(100);            log.info("end...");            semaphore1.release();        }, "thread-a").start();        new Thread(() -> {            try {                semaphore1.acquire();            } catch (InterruptedException e) {                e.printStackTrace();            }            log.info("start...");            sleep(100);            log.info("end...");            semaphore1.release();            semaphore2.release();        }, "thread-b").start();        new Thread(() -> {            try {                semaphore2.acquire();            } catch (InterruptedException e) {                e.printStackTrace();            }            log.info("start...");            sleep(100);            log.info("end...");            semaphore2.release();        }, "thread-c").start();    }}

2.8.2 运行结果

2023-04-11 11:00:58 [ thread-a ]  INFO ThreadDemo8:42 - start...2023-04-11 11:00:58 [ thread-a ]  INFO ThreadDemo8:44 - end...2023-04-11 11:00:58 [ thread-b ]  INFO ThreadDemo8:54 - start...2023-04-11 11:00:58 [ thread-b ]  INFO ThreadDemo8:56 - end...2023-04-11 11:00:58 [ thread-c ]  INFO ThreadDemo8:67 - start...2023-04-11 11:00:58 [ thread-c ]  INFO ThreadDemo8:69 - end...

2.9 使用LockSupport的park与unpark方法

java.util.concurrent.locks.LockSupport#park()

java.util.concurrent.locks.LockSupport#unpark(Thread thread)

• park：方法是使当前线程暂停运行
• unpark：方法是使指定线程恢复运行

2.9.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.locks.LockSupport;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo9 {        static volatile boolean isRunA = false;        static volatile boolean isRunB = false;    public static void main(String[] args) {        Thread threadC = new Thread(() -> {            while (!isRunB) {                LockSupport.park();            }            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-c");        Thread threadB = new Thread(() -> {            while (!isRunA) {                LockSupport.park();            }            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");            isRunB = true;            LockSupport.unpark(threadC);        }, "thread-b");        Thread threadA = new Thread(() -> {            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");            isRunA = true;            LockSupport.unpark(threadB);        }, "thread-a");        threadC.start();        threadB.start();        threadA.start();    }}

2.9.2 运行结果

2023-04-11 11:25:20 [ thread-a ]  INFO ThreadDemo9:56 - start...2023-04-11 11:25:20 [ thread-a ]  INFO ThreadDemo9:59 - end...2023-04-11 11:25:20 [ thread-b ]  INFO ThreadDemo9:46 - start...2023-04-11 11:25:20 [ thread-b ]  INFO ThreadDemo9:49 - end...2023-04-11 11:25:20 [ thread-c ]  INFO ThreadDemo9:36 - start...2023-04-11 11:25:20 [ thread-c ]  INFO ThreadDemo9:39 - end...

2.10 使用阻塞队列的put与take方法

阻塞队列的常用API

本例主要是使用take操作的阻塞作用

2.10.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.BlockingQueue;import java.util.concurrent.LinkedBlockingQueue;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo10 {    static volatile boolean isRunA = false;    static volatile boolean isRunB = false;    static BlockingQueue<Object> queue1 = new LinkedBlockingQueue<>();    static BlockingQueue<Object> queue2 = new LinkedBlockingQueue<>();    public static void main(String[] args) {        final Object obj = new Object();        Thread threadA = new Thread(() -> {            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");            isRunA = true;            try {                queue1.put(obj);            } catch (InterruptedException e) {                e.printStackTrace();            }        }, "thread-a");        Thread threadB = new Thread(() -> {            while (!isRunA) {                try {                    queue1.take();                } catch (InterruptedException e) {                    e.printStackTrace();                }            }            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");            isRunB = true;            try {                queue2.put(obj);            } catch (InterruptedException e) {                e.printStackTrace();            }        }, "thread-b");        Thread threadC = new Thread(() -> {            while (!isRunB) {                try {                    queue2.take();                } catch (InterruptedException e) {                    e.printStackTrace();                }            }            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-c");        threadC.start();        threadB.start();        threadA.start();    }}

2.10.2 运行结果

2023-04-11 12:19:10 [ thread-a ]  INFO ThreadDemo10:32 - start...2023-04-11 12:19:10 [ thread-a ]  INFO ThreadDemo10:35 - end...2023-04-11 12:19:10 [ thread-b ]  INFO ThreadDemo10:52 - start...2023-04-11 12:19:10 [ thread-b ]  INFO ThreadDemo10:55 - end...2023-04-11 12:19:10 [ thread-c ]  INFO ThreadDemo10:73 - start...2023-04-11 12:19:10 [ thread-c ]  INFO ThreadDemo10:76 - end...

2.11 使用CAS思想来实现线程的顺序运行（AtomicReference）

compare and swap的缩写，中文翻译成比较并交换, 实现并发算法时常用到的一种技术。它包含三个操作数——内存位置、预期原值及更新值。

执行CAS操作的时候，将内存位置的值与预期原值比较：

如果相匹配，那么处理器会自动将该位置值更新为新值，

如果不匹配，处理器不做任何操作，多个线程同时执行CAS操作只有一个会成功。

2.11.1 实现代码

package cn.lyf.leetcode.thread.demo;import lombok.extern.slf4j.Slf4j;import java.util.concurrent.atomic.AtomicReference;import static cn.lyf.leetcode.thread.demo.ThreadDemo1.sleep;@Slf4jpublic class ThreadDemo11 {    public static void main(String[] args) {        AtomicReference<Thread> threadAtomicReference = new AtomicReference<>();        Thread threadA = new Thread(() -> {            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");            threadAtomicReference.set(Thread.currentThread());        }, "thread-a");        Thread threadB = new Thread(() -> {            while (!threadAtomicReference.compareAndSet(threadA, null)) {                sleep(1);            }            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");            threadAtomicReference.set(Thread.currentThread());        }, "thread-b");        Thread threadC = new Thread(() -> {            while (!threadAtomicReference.compareAndSet(threadB, null)) {                sleep(1);            }            log.info("start...");            // 模拟业务执行时长            sleep(100);            log.info("end...");        }, "thread-c");        threadC.start();        threadB.start();        threadA.start();    }}

2.11.2 运行结果

2023-04-11 14:06:32 [ thread-a ]  INFO ThreadDemo11:23 - start...2023-04-11 14:06:32 [ thread-a ]  INFO ThreadDemo11:26 - end...2023-04-11 14:06:32 [ thread-b ]  INFO ThreadDemo11:34 - start...2023-04-11 14:06:32 [ thread-b ]  INFO ThreadDemo11:37 - end...2023-04-11 14:06:32 [ thread-c ]  INFO ThreadDemo11:45 - start...2023-04-11 14:06:33 [ thread-c ]  INFO ThreadDemo11:48 - end...

3 参考文章

• 多线程-顺序执行

来源地址：https://blog.csdn.net/lyf_zm/article/details/130082773