6, JAVA5 thread pool fixed size thread pool Newfixedthreadpool

1  PackageCom.yzl;2 3 ImportJava.util.Random;4 Importjava.util.concurrent.Callable;5 ImportJava.util.concurrent.ExecutorService;6 Importjava.util.concurrent.Executors;7 Importjava.util.concurrent.Future;8 ImportJava.util.concurrent.TimeUnit;9 Ten  Public classThreadPool { One      Public Static voidMain (string[] args) { A Fixedthreadpool (); -     } -      the     /** - * fixed-size thread pool -      *  - * At the same time can handle the "parameter" task, the extra task will be queued, when the processing of a one will immediately go to the queue to deal with the task.  +      */ -     Private Static voidFixedthreadpool () { +Executorservice es = Executors.newfixedthreadpool (2); A         //Join 5 Quests at          for(intI=1; i<5; i++){ -             Final intTask =i; -Es.submit (NewRunnable () { - @Override -                  Public voidrun () { -                      for(intJ=1; j<=2; J + +){ inSYSTEM.OUT.PRINTLN ("Now running is the first" "+ Task +" "Task"); -System.out.println (Thread.CurrentThread (). GetName () + "is work, now loop to" +j); to                         if(j==2){ +SYSTEM.OUT.PRINTLN ("task" + task + "Run Complete"); -                         } the                         Try { *Thread.Sleep (100); $}Catch(interruptedexception e) {Panax Notoginseng e.printstacktrace (); -                         } the                     } +                 } A             }); the         } +System.out.println ("5 runnable task submit complete!!")); -  $         //Add 5 callable Tasks, the task after the completion of a return value will be blocked, that is, the results of 5 tasks will not continue to go down $          for(intI=1; i<=5; i++){ -             Final intTask =i; -future<integer> future = Es.submit (NewCallable<integer>() { the @Override -                  PublicInteger Call ()throwsException {Wuyi                     Try { theThread.Sleep (100); -}Catch(interruptedexception e) { Wu e.printstacktrace (); -                     } AboutSYSTEM.OUT.PRINTLN ("Callable task" + task + "Run"); $                     return NewRandom (). Nextint (100); -                 } -             }); -              A             //If the comment takes the result of the code, it does not clog +             /*try { the System.out.println ("task" + i + "" Returned result: "+ future.get ()); - } catch (Exception e) { $ e.printstacktrace (); the             }*/ the         }     theSystem.out.println ("5 callable Task submit complete!!" +System.currenttimemillis ()); the         //Although the shutdown method does not actually stop the thread pool until all tasks have been completed, the method does not cause a blockage, which means that the next line of code runs immediately after the code is run - Es.shutdown (); inSystem.out.println ("Main program shutdown after exit!!" +System.currenttimemillis ()); the          the         //the direct termination thread pool of violence About         //Es.shutdownnow (); the          the         //The Awaittermination method is plug-in, and only when the thread pool is really stopped will the program continue to execute . the         Try { +Es.awaittermination (2, timeunit.seconds); -}Catch(interruptedexception e) { the e.printstacktrace ();Bayi         } the          theSystem.out.println ("main program awaittermination after exit!!" +System.currenttimemillis ());  -  }  -}

Program Run Result:

1 5 runnable Tasks submit complete !!2Now running is section "1the Task3Now running is section "2the Task4Pool-1-thread-1is work, now loop to 15Pool-1-thread-2is work, now loop to 16 5 Callable Task submit complete!! 14412958485267 after the main program shutdown quit!! 14412958485268Now running is section "2the Task9Pool-1-thread-2is work, now loop to 2TenTask "2the Run complete OneNow running is section "1the Task APool-1-thread-1is work, now loop to 2 -Task "1the Run complete -Now running is section "3the Task thePool-1-thread-2is work, now loop to 1 -Now running is section "4the Task -Pool-1-thread-1is work, now loop to 1 -Now running is section "3the Task +Pool-1-thread-2is work, now loop to 2 -Task "3the Run complete +Now running is section "4the Task APool-1-thread-1is work, now loop to 2 atTask "4the Run complete -Callable Task "2the Run -Callable Task "1the Run -Callable Task "4the Run -Callable Task "3the Run -Callable Task "5the Run in Main programawaitterminationafter exiting!! 1441295849228

6, JAVA5 thread pool fixed size thread pool Newfixedthreadpool