基礎例程android文件java多線程的例子

packageimportjava.io.BufferedInputStream;importjava.io.RandomAccessFile;.HttpURLConnection;import.URL;importimportprivatestaticfinalintTHREAD_COUNT=privateCountDownLatchlatch=newCountDownLatch(THREAD_COUNT);privatelongcompleength=0; long//進行的線classDownloadThreadextendsThread{privateURLurl;privateRandomAccessFilefile;privatelongfrom;privatelong@paramurl的@paramfile完成之后的文@paramfrom@paramend當前線程對應文件的結束位DownloadThread(URLurl,RandomAccessFilefile,longfrom,longend){this.url=url;this.file=file;this.from=from;this.end=end;}publicvoidrun(){try{longpos=byte[]buf=newHttpURLConnectioncn=(HttpURLConnection)//因為有些根據它判斷是否是盜 cn.setRequestProperty("Range","bytesfromend);if(cn.getResponseCode()!=200&&cn.getResponseCode()!=206){System.out.println("ResponceCode:"+cn.getResponseCode());}BufferedInputStreambis=newBufferedInputStream(cn.getInputStream());intlen;while((len=bis.read(buf))>0){synchronized(file){file.write(buf,0,len);}pos+=len;compleength+=len;System.out.println(compleength*100/fileLength+}}catch(Exceptione){}}}publicvoiddownload(Stringaddress)throwsException{URLurl=newURL(address);URLConnectioncn=url.openConnection();cn.setRequestProperty("Referer","htt fileLength=cn.getContentLength();longpackageLength=fileLength/THREAD_COUNT;longleftLength=fileLength%THREAD_COUNT;RandomAccessFilefile=newRandomAccessFile("sapco.rar",longpos=0;for(inti=0;i<THREAD_COUNT;i++)longendPos=pos+if(leftLength>0){}newDownloadThread(url,file,pos,endPos).start();pos=endPos;}}publicstaticvoidmain(String[]args)throwsException{longtime=System.currentTimeMillis();new System.out.println(System.currentTimeMillis()-time);}}Java多線程同步具體Java多線程同步在語言應用中十分的關鍵，我們在不斷的學Java多線程同步的應synchronized,下面的火車票的售票系統(tǒng)的模型：同步分為同步塊和同步方法：1.classSel-Java多線程同步具體Java多線程同步在語言應用中十分的關鍵，我們在不斷Java多線程同步1.classSellThreadimplementsRunnableinttickets=100SvnObjectobj=newbooleanpublicvoidrun()Svn中文網Svn12.}15.while(trueSvn22.}參考資料23.catch(Exceptione)Svn27.synchronized(thisSvnSvnSvnselltickets:"+tickets);Svn中文網Svn中文網SvnSvnSvn}publicsynchronizedvoid{{參考資料52.catch(ExceptioneSvn54.e.printStackTrace();58."selltickets:"+tickets);Svn中文網Svn63.}Svn程同步中每個對象都有一個監(jiān)視器----this所代表的對象的鎖，同步塊本文來自 中文網 ]轉發(fā)請保留本站地址Java多線程同步在語言應用中十分的關鍵，我們在不斷的學習中就會注意到這一點。下面Java多線程同步在語言應用中十分的關鍵，我們在不斷的學習中就會注意到這一點。下面1.classSellThreadimplementsRunnableintObjectobj=new