Running a Java Process

[Maha Hassan]

Dear All,

I want to use Runtime.getRuntime().exec("java file"). And i have two questions.

The first, how to choose the working directory since file is on a different folder.

The second, How to check the output if the process. I tried

 Process p = Runtime.getRuntime().exec("java Filename ",null,new File("C:\\"));
   BufferedReader inp = new BufferedReader(new InputStreamReader(p.getInputStream()));
   
   InputStream in = p.getInputStream();
   while((s= inp.readLine())!=null)
   {
    System.out.print(s);
   } 

but It keeps printing questions marks ???

Thanks

Maha