Analysis of application of Java thread pool

Storage Data Tool class, dedicated to the main thread read up data

ImportJava.util.Queue;ImportJava.util.concurrent.ArrayBlockingQueue;/*** Save an array of strings to read on each main thread@authorWinkey **/ Public classBatchdataarrholder {Private Static Final intQueue_size = 1000000; Private StaticQueue<string[]> Data_queue =NewArrayblockingqueue<string[]>(queue_size);  Public Static voidpush (string[] data) {data_queue.add (data); }     Public Staticstring[] Take () {Try {            return((arrayblockingqueue<string[]>) data_queue). Take (); } Catch(interruptedexception e) {e.printstacktrace (); }        return NULL; }         Public Static BooleanIsEmpty () {returnData_queue.isempty (); }}

Main Program class:

ImportJava.io.BufferedReader;ImportJava.io.BufferedWriter;ImportJava.io.FileReader;ImportJava.io.FileWriter;Importjava.io.IOException;ImportJava.util.Map;ImportJava.util.concurrent.ExecutorService;Importjava.util.concurrent.Executors;/*** Multi-threaded character stream *@authorWinkey **/ Public classMyThread2extendsthread{ Public StaticSortarray Sortarray =NewSortarray (10000) ;  Public voidrun () {//This method is written so right???          while(true) {string[] Batchdataarr=Batchdataarrholder.take (); if(NULL= = Batchdataarr)Continue; if(NULL!=Batchdataarr) {                 for(inti=0;i<batchdataarr.length;i++) {String str=Batchdataarr[i]; Integer Numasint=integer.valueof (str); System.out.println (Thread.CurrentThread (). GetName ()+"__"+Numasint);
　　　　　　　　　　　The //setbit method is defined in the sort class, and I add the keyword synchronized to the Setbit method.  sortarray.setbit (numasint,                     1); }            }        }    }          Public Static voidMain (string[] args)throwsException {BufferedReader in=NewBufferedReader (NewFileReader ("E:\\b.txt")); BufferedWriter out=NewBufferedWriter (NewFileWriter ("E:\\cc.txt")); Batchdataarrholder Holder=NewBatchdataarrholder (); intReadlength = 0; Char[] chars =New Char[5]; String Tail=NULL;                String Batchdata; Try{            //Create a thread pool that can reuse a fixed number of threadsExecutorservice pool = Executors.newfixedthreadpool (2);//two sub-threadsMyThread2 MT1 =NewMyThread2 (); MyThread2 mt2=NewMyThread2 ();
　　　　　　　////The thread reads the data before the child thread starts, parses the data, so is it written right?            Pool.execute (MT1);             Pool.execute (MT2);  while(true) {Readlength= In.read (chars, 0, chars.length); //not read the data indicates that the last read data has been read, no longer processed                if(Readlength = = 0)                     Break; BooleanIsend =false; //The data read is less than the array length, indicating that this time has been read, after processing this time no longer continue to read                if(Readlength <chars.length) {                    //System.out.println (string.valueof (chars) substring (0, readlength));Batchdata = string.valueof (chars). substring (0, readlength); Isend=true; }Else{                    //System.out.println (string.valueof (chars));Batchdata =string.valueof (chars); }                //the remaining data after the previous                if(Tail! =NULL) {Batchdata= "" +tail+Batchdata; }                //intercept the rest of the data and save it for the next time.Tail = batchdata.substring (Batchdata.lastindexof (",") +1, Batchdata.length ()); if(Tail.length () ==0) {Tail=NULL; } batchdata= Batchdata.substring (0,batchdata.lastindexof (",")); String[] Batchdataarr=NewString[batchdata.split (","). length];//multithreaded processing this thing!!! Batchdataarr = Batchdata.split (","); Holder.push (Batchdataarr);//The main thread saves the data that is read each time to                                if(isend==true){                     Break; }            }             //Shut down threads, so close child threads, right???               while(true){                 if(Batchdataarrholder.isempty ()) {Pool.shutdown ();  Break; }             }            //Write DataInteger Sortunit =Sortarray.getmaxnum ();            System.out.println (Sortunit);  for(inti = 0;i<=sortunit;i++){                if(Sortarray.getbit (i) ==1) {StringBuffer buf=NewStringBuffer ("+i+" "); Buf.append (","); Integer Num=SortArray.repeatingData.get (i); if(num!=NULL&& num>=2){                         for(intj=2;j<=num;j++) {buf.append ("" +i+ "). Append (", ");                }} out.write (Buf.tostring ());        }} out.flush (); }finally{            if(in!=NULL){                 Try{in.close (); }Catch(IOException e) {e.printstacktrace (); }            }             if(out!=NULL){                 Try{out.close (); }Catch(IOException e) {e.printstacktrace (); }            }        }    }}

Analysis of application of Java thread pool