Learn from the beginning multi-threading-2.17 synchronous methods and synchronous static code blocks hold different locks

In this chapter we discuss the synchronization method and the synchronous static block of code that hold different locks.

Code Listing:

Package com.ray.deepintothread.ch02.topic_18;/** * * @author Raylee * */public class Synchclass {public static void main ( String[] args) throws Interruptedexception {MyService myservice = new MyService (); Threadone Threadone = new Threadone (); Thread thread = new Thread (threadone); Thread.Start (); Threadtwo threadtwo = new Threadtwo (MyService); Thread thread2 = new Thread (threadtwo); Thread2.start ();}} Class Threadone implements Runnable {@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 static int id = 0;public synchronized static void UpdateA () throws interruptedexception {for (int i = 0; I < 5; i++) {System.out.println (Thread.CurrentThread (). GetName () + "" + id++);Thread.Sleep (50);}} Public synchronized void Updateb () throws interruptedexception {for (int i = 0; i < 5; i++) {System.out.println (Thread. CurrentThread (). GetName () + "" + id++); Thread.Sleep (100);}}

Output:

Thread-0 0
Thread-1 1
Thread-0 2
Thread-1 3
Thread-0 4
Thread-0 5
Thread-0 6
Thread-1 7
Thread-1 8
Thread-1 9

As you can see from the output, the output of two threads is out of sync, proving that two methods hold different locks.

Summary: This chapter mainly shows that the synchronization method and the synchronous static code block hold different locks.

This chapter is here, thank you.

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

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

Learn from the beginning multi-threading-2.17 synchronous methods and synchronous static code blocks hold different locks