课程配套课件10并发调试和jdk8新特性

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01publicclassUnsafeArrayListstaticArrayListal=newstaticclassAddTaskimplementsRunnable{ publicvoidrun(){ try{

for(inti=0;i< al.add(newObject());}

}catch(InterruptedExceptione)publicstaticvoidmain(String[]args)throwsInterruptedExceptionThreadt1=newThread(newThreadt2=newThread(newThreadt3=newThread(newpublicvoidrun()try

30

}

}catch(InterruptedExceptione)

线程Dumpjstack

JDK8和AtomicInteger在AtomicIntegerpublicvoidadd(longpublicvoidpublicvoidpubliclongpubliclongpublicint

JDK8

JDK8实现CompletionStage接口（40余个方法Java8中对Futurestage.thenApply(x->square(x)).thenAccept(x->System.out.print(x)).thenRun(()->

JDK80101publicstaticclassAskThreadimplementsRunnable{ CompletableFuture<Integer>re=null; this.re=re; publicvoidrun() intmyRe= try myRe=re.get()* }catch(Exceptione) 1719publicstaticvoidmain(String[]args)throwsInterruptedException26newThread(newAskThread(future)).start();//告知完成结果

JDK80101publicstaticIntegercalc(Integerpara)08try}catch(InterruptedExceptione)}returnpublicstaticvoidmain(String[]args)throwsInterruptedException,ExecutionExceptionfinalCompletableFuture<Integer>futureCompletableFuture.supplyAsync(()->14

JDK8staticstatic<U>CompletableFuture<U>static<U>CompletableFuture<U> r,Executor

JDK8

01publicstaticIntegercalc(Integerpara)

try

}catch(InterruptedExceptione){ return08publicstaticvoidmain(String[]args)throwsInterruptedException,ExecutionException pletableFuture.supplyAsync(()->.thenApply((i)-.thenApply((str)-16

JDK8组合多个publicpublic<U> pose(Function<?superT,?extendsCompletionStage<U>>01publicstaticIntegercalc(Integerpara){ returnpara/2;0305publicstaticvoidmain(String[]args)throwsInterruptedException,ExecutionException{ CompletableFuture<Void>fu=CompletableFuture.supplyAsync(()->pose((i)->CompletableFuture.supplyAsync(()->calc(i)))09 .thenApply((str)->"\""+str+"\"").thenAccept(System.out::println); 11

JDK801publicclassPoint读写锁的改

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privatedoublex,privatefinalStampedLocksl=newvoidmove(doubledeltaX,doubledeltaY){//anexclusivelylockedmethodlongstamp=sl.wri tryx+=deltaX;y+=}finally}}doubledistanceFromOrigin(){//Aread-onlymethodlongstamp=sl.tryOptimisticRead();doublecurrentX=x,currentY=y;if(!sl.validate(stamp))stamp=sl.rea