线程交互

 

使用synchronized方式进行线程交互，用到的是同步对象的wait,notify和notifyAll方法

Lock也提供了类似的解决办法，首先通过lock对象得到一个Condition对象，然后分别调用这个Condition对象的：await, signal,signalAll 方法

注意： 不是Condition对象的wait,nofity,notifyAll方法,是await,signal,signalAll

代码比较复制代码

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

package multiplethread;    import java.text.SimpleDateFormat; import java.util.Date; import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock;    public class TestThread {        public static String now() {         return new SimpleDateFormat("HH:mm:ss").format(new Date());     }        public static void log(String msg) {         System.out.printf("%s %s %s %n", now() , Thread.currentThread().getName() , msg);     }        public static void main(String[] args) {         Lock lock = new ReentrantLock();         Condition condition = lock.newCondition();                   Thread t1 = new Thread() {             public void run() {                 try {                     log("线程启动");                     log("试图占有对象：lock");                        lock.lock();                        log("占有对象：lock");                     log("进行5秒的业务操作");                     Thread.sleep(5000);                     log("临时释放对象 lock， 并等待");                     condition.await();                     log("重新占有对象 lock，并进行5秒的业务操作");                     Thread.sleep(5000);                    } catch (InterruptedException e) {                     e.printStackTrace();                 } finally {                     log("释放对象：lock");                     lock.unlock();                 }                 log("线程结束");             }         };         t1.setName("t1");         t1.start();         try {             //先让t1飞2秒             Thread.sleep(2000);         } catch (InterruptedException e1) {             // TODO Auto-generated catch block             e1.printStackTrace();         }         Thread t2 = new Thread() {                public void run() {                 try {                     log("线程启动");                     log("试图占有对象：lock");                        lock.lock();                        log("占有对象：lock");                     log("进行5秒的业务操作");                     Thread.sleep(5000);                     log("唤醒等待中的线程");                     condition.signal();                    } catch (InterruptedException e) {                     e.printStackTrace();                 } finally {                     log("释放对象：lock");                     lock.unlock();                 }                 log("线程结束");             }         };         t2.setName("t2");         t2.start();     }    }