Producer and consumer (communication between multiple threads) in Java for communication between multithreading

In the real development of multi-threaded communication problems with the following examples are more

Different places when the difference between if and while is only two threads of communication, using if is not a problem.

But there's a problem between multiple threads.

1 /*2 * This example is used to explain the situation of multiple producers and multiple consumers3  */4 5 /*6 * Resource Library7  */8 classResource9 {Ten     PrivateString name; One     Private intCount = 1; A     Private BooleanFlag =false; -      Public synchronized voidset (String name) { -          the          while(flag) -             Try{ This. Wait ();} -             Catch(Exception e) { -                  +             } -              This. Name = name + "--" + count++; +System.out.println (Thread.CurrentThread (). GetName () + "Production goods" + This. Name); AFlag =true; at              This. Notifyall (); -              -         } -      -      -      Public synchronized voidout () { in          while(!flag) -             Try{ This. Wait ();} to             Catch(Exception e) { +                  -             } theSystem.out.println (Thread.CurrentThread (). GetName () + "consumed" + This. Name); *Flag =false; $              This. Notifyall ();Panax Notoginseng         } -          the     } +  A /* the * Producer +  */ - classProducerImplementsRunnable $ { $     PrivateResource Res; - Producer (Resource res) { -          the          This. res =Res; -     }Wuyi      Public voidrun () { the          -          while(true){ Wu              -Res.set ("Toothpaste"); About         } $     } -      -      - } A /* + * Consumer the  */ - classConsumerImplementsRunnable $ { the  the     PrivateResource Res; the Consumer (Resource res) { the          -          This. res =Res; in     } the      Public voidrun () { the          About          while(true){ the res.out (); the         } the     } + } -  Public classProducerconsumerdemo { the Bayi      Public Static voidMain (string[] args) { the         //TODO auto-generated Method Stub theResource res =NewResource (); -          -Producer P1 =NewProducer (res); theProducer P2 =NewProducer (res); the          theConsumer C1 =NewConsumer (res); theConsumer C2 =NewConsumer (res); -          theThread T1 =NewThread (p1); theThread t2 =NewThread (p2); theThread t3 =NewThread (C1);94Thread T4 =NewThread (C2); the          the T1.start (); the T2.start ();98 T3.start (); About T4.start (); - 101 102 103     }104  the}

Producer and consumer of communication between multithreading in Java (communication between multiple threads)