Wait and notify in the "Java" thread

Synchronization problems in threads usually use the synchronized block, combined with the wait and notify methods, to do a simple test today. It is found that when a thread locks a critical resource, another thread waits for it, and in the past thinks it needs to write its own code to wait for it ...

Shared resources:

package sm.model;import org.apache.log4j.logger;public class threadfuncs {/** *  Logger for this class */private static final Logger logger  = logger.getlogger (Threadfuncs.class);p Rivate int sharenum;public threadfuncs (int  Initsharenum) {this.sharenum = initsharenum;} PUBLIC&NBSP;VOID&NBSP;RUN1 ()  {if  (sharenum < 10)  {synchronized  (this)  { for  (;  sharenum < 30; sharenum++)  {logger.info ("I go to print   " + sharenum"; try {thread.sleep (500);}  catch  (interruptedexception e)  {e.printstacktrace ();} if  (SHARENUM&NBSP;==&NBSP;10)  {try {this.wait ();}  catch  (interruptedexception e)  {// TODO Auto-generated catch  Blocke.printstacktrace ();}}}}} Public void run2 ()  {/*logger.info ("i am in run2  " + sharenum);while  (sharenum == 0)  {try {logger.info (" I am  in while  " + sharenum); Thread.Sleep (1000);}  catch  (interruptedexception e)  {// TODO Auto-generated catch  Blocke.printstacktrace ();}} */synchronized  (this)  {for  (;  sharenum < 20; sharenum++)  { Logger.info ("print "  + sharenum); Try {thread.sleep (500);}  catch  (interruptedexception e)  {e.printstacktrace ();}} This.notify ();}}}

Thread 1:

Package Sm.examples.threaddemo;import Sm.model.threadfuncs;public Class Thread3_1 extends Thread {private Threadfuncs Funcs;public thread3_1 (Threadfuncs funcs) {this.funcs = Funcs;} @Overridepublic void Run () {funcs.run1 ();}}

Thread 2:

Package Sm.examples.threaddemo;import Sm.model.threadfuncs;public Class Thread3_2 extends Thread {private Threadfuncs Funcs;public thread3_2 (Threadfuncs funcs) {this.funcs = Funcs;} @Overridepublic void Run () {funcs.run2 ();}}

Test class:

Package Sm.test;import Org.junit.test;import Sm.examples.threaddemo.thread3_1;import Sm.examples.threaddemo.thread3_2;import Sm.model.threadfuncs;public class Testthreadwaitnotifydemo {@Testpublic void Test () {Threadfuncs Funcs = new Threadfuncs (0); Thread T1 = new Thread3_1 (FUNCS); Thread t2 = new Thread3_2 (funcs); T1.start (); T2.start (); try {thread.sleep (100000);} catch (Interruptedexception e) { E.printstacktrace ();}}}

Wait and notify in the "Java" thread