Java使用锁实现多线程顺序交替执行方式二

男娘i 2022-12-23 01:58 87阅读 0赞

### 1、原理 ###

Lock同步锁

Condition的signal()和await()

### 2、代码示例 ###

package com.thread;
    
    import java.util.concurrent.ExecutorService;
    import java.util.concurrent.Executors;
    import java.util.concurrent.locks.Condition;
    import java.util.concurrent.locks.Lock;
    import java.util.concurrent.locks.ReentrantLock;
    
    public class TasksTestLock extends Thread {
        private static Lock lock = new ReentrantLock();
        private static Condition condition = lock.newCondition();
        private static int num = 1;
        private int id;
    
        public TasksTestLock(int id) {
            this.id = id;
        }
    
    
        @Override
        public void run() {
            while (num <= 12) {
    
                lock.lock();
    
                System.out.println("Thread" + id + " num:" + num);
                num++;
    
                condition.signal();
                try {
                    condition.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
    
                lock.unlock();
    
            }
        }
    
    
        public static void main(String[] args) {
            Thread thread0 = new TasksTestLock(0);
            Thread thread1 = new TasksTestLock(1);
    
            ExecutorService exec = Executors.newFixedThreadPool(3);
    
            exec.submit(thread0);
            exec.submit(thread1);
    
            exec.shutdown();
    
        }
    }

### 3、输出结果 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppYWhhbzExODY_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppYWhhbzExODY_size_16_color_FFFFFF_t_70]: /images/20221120/805fd66cb3c7463badd87726323a657e.png