Learn from the beginning multithreading -2.12 synchronized () code blocks can be used not only with this, but also with other objects

In this chapter we discuss another use of the synchronized () code block, which can be used not only with this, but also with other objects.

1. Code Listing

Package com.ray.deepintothread.ch02.topic_13;/** * * @author Raylee * */public class Objectlock {public static void main ( String[] args) throws Interruptedexception {MyService myservice = new MyService (); Threadone Threadone = new Threadone (MyService); Thread thread = new Thread (threadone); Thread.Start (); Threadtwo threadtwo = new Threadtwo (MyService); Thread thread2 = new Thread (threadtwo); Thread2.start ();}} Class Threadone implements Runnable {private MyService myservice;public threadone (MyService myservice) {This.myservice = MyService;} @Overridepublic void Run () {try {Myservice.updatea ();} catch (Interruptedexception e) {e.printstacktrace ()}}} Class Threadtwo implements Runnable {private MyService myservice;public threadtwo (MyService myservice) {This.myservice = MyService;} @Overridepublic void Run () {try {myservice.updateb ();} catch (Interruptedexception e) {e.printstacktrace ()}}} Class MyService {private Object object;public MyService () {object = new object ();} public void UpdateA () throWS Interruptedexception {synchronized (object) {Long startTime = System.currenttimemillis (); System.out.println ("UpdateA startTime:" + startTime); Thread.Sleep (+); Long endTime = System.currenttimemillis (); System.out.println ("UpdateA endTime:" + EndTime);}} public void Updateb () throws Interruptedexception {synchronized (object) {Long startTime = System.currenttimemillis (); System.out.println ("Updateb startTime:" + startTime); Thread.Sleep (+); Long endTime = System.currenttimemillis (); System.out.println ("Updateb endTime:" + EndTime);}}}

Output:

UpdateA starttime:1462455786957
UpdateA endtime:1462455787958
Updateb starttime:1462455787958
Updateb endtime:1462455788958

2. Conclusion

From the output can be seen, compared to the previous section of the code, we put the synchronized () inside of a new object (), and this object is not necessarily object, can be any object

Summary: This chapter shows another use of the synchronized () code block, which can be used not only with this, but also with other objects.

This chapter is here, thank you.

------------------------------------------------------------------------------------

My github:https://github.com/raylee2015/deepintothread.

Catalog: http://blog.csdn.net/raylee2007/article/details/51204573

This chapter is here, thank you.

------------------------------------------------------------------------------------

My github:https://github.com/raylee2015/deepintothread.

Catalog: http://blog.csdn.net/raylee2007/article/details/51204573

Learn from the beginning multithreading -2.12 synchronized () code blocks can be used not only with this, but also with other objects