import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
 
/**
 * @author Leyer
 */
public class ThreadForDownload extends Thread{
	public static void main(String []args){
		try {
			new ThreadForDownload(new URL("http://www.tecnun.es/asignaturas/Informat1/ayudainf/aprendainf/Java/Java2.pdf"),"/home/leyer").start();
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private URL           url          =   null;
	private URLConnection connection   =   null;
	private int offset = 0;
	private boolean init   = true;
	String path;
	private FileOutputStream fileOutputStream;
	public ThreadForDownload(
			final URL URL,
			String path) {
	this.url = URL;this.path = path;
	}
 
	@Override
	public synchronized void run() {
		while(init){
		try {
		System.out.println("-----------------------------------");
		System.out.println("Host: "+url.getHost());
		System.out.println("NOmbre del Archivo: "+getFileName(url));
		System.out.println("Tamaño: "+getLength(url));
		System.out.println("-----------------------------------");
		 connection = url.openConnection();
			} catch (IOException e) {System.err.println("Error in conection!");System.exit(0);
			} catch (Exception e) {
				e.printStackTrace();System.exit(0);
			}
		int read = 0;
		final int SIZE = getLength(url);
		InputStream stream  =  null;
		try {
			System.out.println("wait...");
		    stream = connection.getInputStream();
			fileOutputStream = new FileOutputStream(path+""+File.separator+getFileName(url));
			final byte[] data = new byte[SIZE];
			while((read = stream.read(data)) > 0){
				offset +=read;
				fileOutputStream.write(data,
						0,
						read);
			   }
			try{
			System.out.println("Completado!");
			fileOutputStream.flush();
			fileOutputStream.close();
			offset = 0;  init = false;
			 break;
		    }catch (Exception e) {	} 
			}catch (Exception e1) {
			  }	 
		   }
		}
 
	public void setInit(boolean init) {
			this.init =false;
			}
		final int getLength(URL urlFile){
		URLConnection connection = null;
		int size = 0;
		try {
		connection = urlFile.openConnection();
			size = connection.getContentLength();
		} catch (IOException e) {
			System.err.println(e+":ERROR");System.exit(0);
		} catch (Exception e) {
			System.err.println(e+":ERROR");System.exit(0);
		}
		return size;
	}
	private final String getFileName(URL URL){
     String path=URL.getPath();
     int lastIndexOf=path.lastIndexOf("/");
     String name = path.substring(lastIndexOf+1);
	 	return name;
 
	}
}

 int porcentaje = 0;
                        System.out.println(porcentaje);
			while((read = stream.read(data)) > 0){
 
 
				offset += read;
                                porcentaje = (offset * 100)/SIZE;
                                System.out.println(porcentaje);
 
				fileOutputStream.write(data,0,read);
			   }