Untitled

package download;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.util.LinkedList;import java.util.List;import java.util.Queue;import java.util.concurrent.Executor;import java.util.concurrent.Executors;public class Downloader {	private static final int numberOfDownloads = 5; 		Queue<String> downloads = new LinkedList<String>();	public static String outputDirectory = ".";	public Downloader(String outputDirectory) {		Downloader.outputDirectory = outputDirectory;				add("URL HERE");		add("URL HERE");		add("URL HERE");		add("URL HERE");		add("URL HERE");	}		private void add(String url) {		this.downloads.add(url);	}		public void execute() {		Executor executor = Executors.newFixedThreadPool (Downloader.numberOfDownloads);				final List<Download> downloads = new LinkedList<Download>();				for (String download: this.downloads) {			Download d = new Download(download);			executor.execute(d);			downloads.add(d);		}		Runtime.getRuntime().addShutdownHook(new Thread() {            public void run() {                for (Download d: downloads) {                	d.shutDown();                }            }        });			}	/**	 * @param args	 */	public static void main(String[] args) {		Downloader d = new Downloader(args[0]);				d.execute();	}	private class Download implements Runnable {		private String url;				private static final String command = "wget -t5 -c -q -np -E -r -k -p -nd --directory-prefix=";				private Process proc;				public Download(String url) {			this.url = url;		}		@Override		public void run() {			System.out.println("downloading " + this.url);			Runtime rt = Runtime.getRuntime();			try {				this.proc = rt.exec(Download.command + outputDirectory + " " + this.url);				InputStream stderr = proc.getErrorStream();				InputStreamReader errorReader = new InputStreamReader(stderr);				BufferedReader br = new BufferedReader(errorReader);//				String line = null;//				while ( (line = br.readLine()) != null) {//					System.out.println(line);//				}								try {					proc.waitFor();				} catch (InterruptedException e) {					e.printStackTrace();				}							} catch (IOException e) {				e.printStackTrace();			}		}		public void shutDown() {			if (this.proc != null) {				this.proc.destroy();			}		}	}	}