Open 4 threads 4 seconds to execute the following programs; part of the code has been annotated cannot be modified (multithreaded)

Open 4 threads to execute the following programs within 4 seconds; part of the code has been marked cannot be modified

1  Public classLogtest {2     //the method inside can't move.3      Public Static voidParselog (String log) {4SYSTEM.OUT.PRINTLN (log + ":" + (System.currenttimemillis ()/1000));5         Try {6Thread.Sleep (1000);7}Catch(Exception e) {8 e.printstacktrace ();9         }Ten     } One  A      Public Static voidMain (string[] args) { -SYSTEM.OUT.PRINTLN ("Begin:" + (System.currenttimemillis ()/1000)); -          for(inti = 0; I < 16; i++) {//can't move . the             FinalString log = "" + (i + 1);//can't move . -             { - logtest.parselog (log); -             } +         } -     } +  A}

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1 ImportJava.util.Queue;2 ImportJava.util.concurrent.ConcurrentLinkedQueue;3 4 /**5 * requires 4 threads to execute, just 4 seconds to get it done.6  * 7  * @authorTrfizeng8  * 9  */Ten  Public classLogtest { One      Public StaticQueue<string> Logqueue =NewConcurrentlinkedqueue<string>(); A  -     //the method inside can't move. -      Public Static voidParselog (String log) { theSYSTEM.OUT.PRINTLN (log + ":" + (System.currenttimemillis ()/1000)); -         Try { -Thread.Sleep (1000); -}Catch(Exception e) { + e.printstacktrace (); -         } +     } A  at      Public Static voidMain (string[] args) { -SYSTEM.OUT.PRINTLN ("Begin:" + (System.currenttimemillis ()/1000)); -          for(inti = 0; I < 16; i++) {//can't move . -             FinalString log = "" + (i + 1);//can't move . -             { -                 //logtest.parselog (log); in logqueue.add (log); -             } to         } +          for(inti = 0; I < 4; i++) { -             NewThread () { the @Override *                  Public voidrun () { $                      while(Logqueue.size () > 0) {Panax Notoginseng Parselog (Logqueue.poll ()); -                     } the                 } + }.start (); A         } the     } +}

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Open 4 threads 4 seconds to execute the following programs; part of the code has been annotated cannot be modified (multithreaded)