Executing external 16 bit programs

Question

i want to execute some old 16 bit programs as back-end . I used process object and successfully executed some 32 bit programs. But when executing 16 bit programs it gives error as 'error in setting up environment' on windows. why is it happening and what changes are needed?try     {
               Process ps=Runtime.getRuntime().exec("cmd.exe /c star1.exe ");     
               OutputStream stdin=null;
               stdin=ps.getOutputStream();
               stdin.write("\n".getBytes());
               stdin.close();
               BufferedReader bos=new BufferedReader(new InputStreamReader(ps.getInputStream()));
               String st=new String();
               String ln=new String("");
               while((ln=bos.readLine())!=null){
                    st+=ln;
                    st+="\n";                    
               bos.close();
               jt.setText(st);
               catch (Exception e)
                    e.printStackTrace();
               }

Answer 1

yeah i tried on some other 16 bit programs and it executes them, so it seems thats not the problem. the error i mentioned was being given to the command line without cmd.exe /c some.exe So thats not the case either. I found
that it doesn't show output unless program is terminated. And if program is waiting for keyboard stroke it doesn't accept it through inputstream of java, which i have in my code. So problem for me now is how to get output form program while it is still running and how to give keyboard stroke input to program expecting such an input. i need a resource suggestion or any kind of help explaining these points. please help me out...