Multithreading 9---Non-real-time communication between threads--lock's wait and notify

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1  Public classLISTADD1 {2     Private volatile StaticList List =NewArrayList ();3     4      Public voidAdd () {5List.add ("Hello");6     }7     8      Public intsize () {9         returnlist.size ();Ten     } One      A      Public Static voidMain (string[] args) { -         FinalListAdd1 List1 =NewListAdd1 (); -         FinalObject lock =NewObject (); theThread T1 =NewThread (NewRunnable () { - @Override -              Public voidrun () { -                 synchronized(lock) {//Object Lock +                     Try { -                          for(inti = 0; I < 10; i++) { + List1.add (); ASystem.out.println (Thread.CurrentThread (). GetName () + "added an element ..."); atThread.Sleep (100); -                              -                             if(list1.size () = = 5) { -SYSTEM.OUT.PRINTLN ("Issue wake-up notification ..."); -Lock.notify ();//The current thread continues execution without releasing lock lock for the current thread -                             } in                         } -}Catch(Exception e) { to e.printstacktrace (); +                     } -                 } the                  *             } $}, "T1");Panax Notoginseng          -Thread t2 =NewThread (NewRunnable () { the @Override +              Public voidrun () { A                 synchronized(lock) {//Object Lock the                     if(List1.size ()! = 5){ +                         Try { -Lock.wait ();//Release Lock $}Catch(interruptedexception e) { $ e.printstacktrace (); -                         } -System.out.println (Thread.CurrentThread (). GetName () + "Thread Stop"); the                         Throw Newruntimeexception (); -                     }Wuyi                 } the             } -}, "T2"); Wu          -T2.start ();//First T2 monitoring, not equal to release the lock, was T1 get, T1 add to 5 notice, continue to wait until execution, T2 start execution! About T1.start (); $          -       /*T1 added an element ... - T1 added an element ... - T1 added an element ... A T1 added an element ... + T1 added an element ... the issue wake-up notification : - T1 added an element ... $ T1 added an element ... the T1 added an element ... the T1 added an element ... the T1 added an element ... the T2 Thread Stop - Exception in thread "T2" Java.lang.RuntimeException in At Com.bjsxt.base.thread06.listadd1$2.run (listadd1.java:54) the At Java.lang.Thread.run (thread.java:744)*/ the     } About}

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Multithreading 9---Non-real-time communication between threads--lock's wait and notify