import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;public class GetURL {    private int mTotalLength;    private int mCurrentLength;    URL mURL;    URLConnection mURLConnection;    public GetURL(String strURL) {        try {            mURL = new URL(strURL);            mURLConnection = mURL.openConnection();        } catch (Exception e) {              e.printStackTrace();        }    }        public int getTotalLen() { return mTotalLength; }    public int getCurrentLen() { return mCurrentLength;}    private void initURLConnection() {        mTotalLength = mURLConnection.getContentLength();        mCurrentLength = 0;    }    private void addCurrentLen(int len) {        mCurrentLength += len;    }    public InputStream getInputStream() {        InputStream in;        try {            in = mURLConnection.getInputStream();        } catch (IOException e) {            e.printStackTrace();            return null;        }        return in;    }    public static void main(String[] args) {        if (args.length != 1) {            System.err.println("argument count error");            return;        }        GetURL url = new GetURL(args[0]);        Runnable downloadThread = new Download(url);        byte[] buffer = new byte[4096];        url.initURLConnection();        new Thread(downloadThread).start();        try {            while (true) {                InputStream in = url.getInputStream();                int count = in.read(buffer);                if (count < 0)                    break;                url.addCurrentLen(count);                String strDebug = new String(buffer, 0, count);                System.out.print(strDebug);                String status = ((Download)downloadThread).getStatus();                if (status.equals("OK")) {                    break;                }            }        } catch (Exception e) {            e.printStackTrace();        }    }}class Download implements Runnable {    GetURL url;    String status;    public Download(GetURL url) {        this.url = url;        status = "RUNNING";    }    public void run() {        int total = url.getTotalLen();        try {            while (true) {                int current = url.getCurrentLen();                System.out.print("\r" + current + "/" + total);                Thread.sleep(500);                if (current >= total) {                    status = "OK";                    break;                }            } // ~while                                                                                                                                                             System.out.println();        } catch (InterruptedException e) {            e.printStackTrace();        }    }    public String getStatus() {        return status;    }}