public void saveToFile(String destUrl) {       FileOutputStream fos = null;       BufferedInputStream bis = null;       HttpURLConnection httpUrl = null;       URL url = null;       intBUFFER_SIZE = 1024;       byte[] buf = newbyte[BUFFER_SIZE];       int size = 0;       try {           url = new URL(destUrl);           httpUrl = (HttpURLConnection) url.openConnection();           httpUrl.connect();           bis = new BufferedInputStream(httpUrl.getInputStream());           String fileName = destUrl.substring(destUrl.lastIndexOf("/"));           System.out.println(fileName);           fos = new FileOutputStream("e:\\haha.jpg");           while ((size = bis.read(buf)) != -1) {              fos.write(buf, 0, size);           }           fos.flush();       } catch (IOException e) {           e.printStackTrace();       } catch (ClassCastException e) {           e.printStackTrace();       } finally {           try {              fos.close();              bis.close();              httpUrl.disconnect();           } catch (IOException e) {              e.printStackTrace();           } catch (NullPointerException e) {              e.printStackTrace();           }       }    }