java 对象的wait和notify

功能说明：线程中执行一个命令，然后等待，直到其他线程有消息通知时该命令才执行结束

 

public class TestWaitNotify {

       void execute() {//excute命令执行后需要等待其他消息回调通知executeComplete完成，才执行结束

              System.out.println("execute begin");

              System.out.println("send cmd to do something, and wait receive cmd complete message");

              try {

                     synchronized (this) {

                            this.wait();

                     }

              } catch (InterruptedException e) {

                     // TODO Auto-generated catch block

                     e.printStackTrace();

              }

              System.out.println("execute end");

       }

      

//通知执行结束

       void executeComplete() {

              System.out.println("execute cmd complete");

              synchronized (this) {

                  this.notify();

              }

       }

}

 

 

测试线程执行execute指令：

public class TestWaitTherad extends Thread{

       TestWaitNotify mTestWait;

       TestWaitTherad(TestWaitNotify testWait){

              mTestWait = testWait;

       }

      

       @Override

       public void run() {

              System.out.println("TestWaitThread run cunnrentId =" + this.getId());

              mTestWait.execute();

       }

}

 

测试main函数，其他线程执行execute,并且在主线程中通知执行结束

public class TestMain {

       public static void main(String[] args) {

       

        TestWaitNotify testwait = new TestWaitNotify();

        TestWaitTherad testThread = new TestWaitTherad(testwait);

        testThread.start();

        try {

                     Thread.sleep(5000);

              } catch (InterruptedException e) {

                     // TODO Auto-generated catch block

                     e.printStackTrace();

              }

        testwait.executeComplete();

       

        try {

                     Thread.sleep(5000);

              } catch (InterruptedException e) {

                     // TODO Auto-generated catch block

                     e.printStackTrace();

              }

       }

}

执行结果：

TestWaitThread run cunnrentId =12

execute begin

send cmd to do something, and wait receive cmd complete message

execute cmd complete

execute end