Multi-threading and multi-producer multiple consumer realization problem

Multi-producer Multi-consumer is a classic case in Java, implemented by the wait-wake mechanism, the code is as follows:

　　

 Public classProducerconsumer { Public Static voidMain (string[] args) {Resource res=NewResource (); Producer Pro1=NewProducer (RES); Producer Pro2=NewProducer (RES); Consumer Con1=NewConsumer (RES); Consumer Con2=NewConsumer (RES); Thread T1=NewThread (Pro1); Thread T2=NewThread (PRO2); Thread T3=NewThread (Con1); Thread T4=NewThread (Con2);        T1.start ();        T2.start ();        T3.start ();    T4.start (); }}classResource {Private intcount; Private Booleanflag=true;  Public synchronized voidProduce () { while(!flag) {            Try {                 This. Wait (); } Catch(interruptedexception e) {e.printstacktrace (); }} System.out.println (Thread.CurrentThread (). GetName ()+ "Production" +count+ "Roast Duck"); Count++; Flag=false;  This. Notifyall (); }     Public synchronized voidconsume () { while(flag) {Try {                 This. Wait (); } Catch(interruptedexception e) {e.printstacktrace (); }} System.out.println (Thread.CurrentThread (). GetName ()+ "consumption" +count+ "Roast Duck"); Flag=true;  This. Notifyall (); }}classProducerImplementsrunnable{Resource R;  PublicProducer (Resource r) {Super();  This. R =R; } @Override Public voidrun () { while(true) {r.produce (); }    }    }classConsumerImplementsRunnable {Resource R;  PublicConsumer (Resource r) {Super();  This. R =R; } @Override Public voidrun () { while(true) {r.consume (); }    }    }

There is also a multi-producer multi-consumer model implemented with Blockqueue:

ImportJava.util.concurrent.BlockingQueue;ImportJava.util.concurrent.LinkedBlockingQueue; Public classProducerconsumer { Public Static voidMain (string[] args) {Resource res=NewResource (); Blockingqueue Queue=NewLinkedblockingqueue (1); Producer Pro1=NewProducer (Res,queue); Producer Pro2=NewProducer (Res,queue); Consumer Con1=NewConsumer (Res,queue); Consumer Con2=NewConsumer (Res,queue); Thread T1=NewThread (Pro1); Thread T2=NewThread (PRO2); Thread T3=NewThread (Con1); Thread T4=NewThread (Con2);        T1.start ();        T2.start ();        T3.start ();    T4.start (); }}classResource {intcount; @Override PublicString toString () {return"Food [count=" + Count + "]"; }    }classProducerImplementsrunnable{Resource R;        Blockingqueue queue;  PublicProducer (Resource R, Blockingqueue queue) {Super();  This. R =R;  This. Queue =queue; } @Override Public voidrun () { while(true) {produce (); }    }     Public voidProduce () {Try{System.out.println ("Production" +R);            Queue.put (R); R.count++; } Catch(interruptedexception e) {e.printstacktrace (); }    }    }classConsumerImplementsRunnable {Resource R;        Blockingqueue queue;  PublicConsumer (Resource R, Blockingqueue queue) {Super();  This. R =R;  This. Queue =queue; } @Override Public voidrun () { while(true) {consume (); }    }     Public voidconsume () {Try{System.out.println ("Consumption" +Queue.take ()); } Catch(interruptedexception e) {e.printstacktrace (); }    }    }

Multi-threading and multi-producer multiple consumer realization problem